Added the third radio button and made them exclusive.

I solved the vertical space problem by eliminating the content margins.

src/calibre/gui2/dialogs/edit_authors_dialog.py

@@ -108,9 +108,13 @@ class EditAuthorsDialog(QDialog, Ui_EditAuthorsDialog):
         self.buttonBox.button(QDialogButtonBox.StandardButton.Cancel).setText(_('&Cancel'))
         self.buttonBox.accepted.connect(self.accepted)
         self.buttonBox.rejected.connect(self.rejected)
-        self.apply_vl_checkbox.setAutoExclusive(False)
+        self.show_button_layout.setSpacing(0)
+        self.show_button_layout.setContentsMargins(0, 0, 0, 0)
+        self.apply_all_checkbox.setContentsMargins(0, 0, 0, 0)
+        self.apply_all_checkbox.setChecked(True)
+        self.apply_vl_checkbox.setContentsMargins(0, 0, 0, 0)
         self.apply_vl_checkbox.toggled.connect(self.use_vl_changed)
-        self.apply_selection_checkbox.setAutoExclusive(False)
+        self.apply_selection_checkbox.setContentsMargins(0, 0, 0, 0)
         self.apply_selection_checkbox.toggled.connect(self.apply_selection_box_changed)
 
         self.table.setAlternatingRowColors(True)
@@ -214,13 +218,9 @@ class EditAuthorsDialog(QDialog, Ui_EditAuthorsDialog):
             self.ignore_cell_changed = orig
 
     def use_vl_changed(self, x):
-        if self.apply_vl_checkbox.isChecked():
-            self.apply_selection_checkbox.setChecked(False)
         self.show_table(None, None, None, False)
 
     def apply_selection_box_changed(self, x):
-        if self.apply_selection_checkbox.isChecked():
-            self.apply_vl_checkbox.setChecked(False)
         self.show_table(None, None, None, False)
 
     def selection_to_apply(self):

src/calibre/gui2/dialogs/edit_authors_dialog.ui

@@ -65,7 +65,16 @@
        </property>
       </spacer>
      </item>
-     <item row="0" column="4">
+     <item row="0" column="4" rowspan="2">
+      <layout class="QVBoxLayout" name="show_button_layout">
+       <item>
+        <widget class="QRadioButton" name="apply_all_checkbox">
+         <property name="text">
+          <string>Show &amp;all authors</string>
+         </property>
+        </widget>
+       </item>
+       <item>
         <widget class="QRadioButton" name="apply_vl_checkbox">
          <property name="toolTip">
           <string>&lt;p&gt;Show authors only if they appear in the
@@ -81,7 +90,7 @@
          </property>
         </widget>
        </item>
-     <item row="1" column="4">
+       <item>
         <widget class="QRadioButton" name="apply_selection_checkbox">
          <property name="toolTip">
           <string>&lt;p&gt;Show items only if they appear in the
@@ -97,6 +106,8 @@
          </property>
         </widget>
        </item>
+      </layout>
+     </item>
      <item row="1" column="0">
       <widget class="QLabel">
        <property name="text">

src/calibre/gui2/dialogs/tag_list_editor.py

@@ -372,9 +372,12 @@ class TagListEditor(QDialog, Ui_TagListEditor):
             ac.triggered.connect(self.clear_filter)
         le.returnPressed.connect(self.do_filter)
         self.filter_button.clicked.connect(self.do_filter)
-        self.apply_vl_checkbox.setAutoExclusive(False)
+        self.show_button_layout.setSpacing(0)
+        self.show_button_layout.setContentsMargins(0, 0, 0, 0)
+        self.apply_all_checkbox.setContentsMargins(0, 0, 0, 0)
+        self.apply_all_checkbox.setChecked(True)
         self.apply_vl_checkbox.toggled.connect(self.vl_box_changed)
-        self.apply_selection_checkbox.setAutoExclusive(False)
+        self.apply_selection_checkbox.setContentsMargins(0, 0, 0, 0)
         self.apply_selection_checkbox.toggled.connect(self.apply_selection_box_changed)
 
         self.is_enumerated = False
@@ -540,14 +543,10 @@ class TagListEditor(QDialog, Ui_TagListEditor):
         return txt.swapcase()
 
     def vl_box_changed(self):
-        if self.apply_vl_checkbox.isChecked():
-            self.apply_selection_checkbox.setChecked(False)
         self.search_item_row = -1
         self.fill_in_table(None, None, False)
 
     def apply_selection_box_changed(self):
-        if self.apply_selection_checkbox.isChecked():
-            self.apply_vl_checkbox.setChecked(False)
         self.search_item_row = -1
         self.fill_in_table(None, None, False)
 

src/calibre/gui2/dialogs/tag_list_editor.ui

@@ -71,7 +71,16 @@
      </property>
     </spacer>
    </item>
-   <item row="0" column="4">
+   <item row="0" column="4" rowspan="2">
+    <layout class="QVBoxLayout" name="show_button_layout">
+     <item>
+      <widget class="QRadioButton" name="apply_all_checkbox">
+       <property name="text">
+        <string>Show &amp;all items</string>
+       </property>
+      </widget>
+     </item>
+     <item>
       <widget class="QRadioButton" name="apply_vl_checkbox">
        <property name="toolTip">
         <string>&lt;p&gt;Show items only if they appear in the
@@ -87,7 +96,7 @@
        </property>
       </widget>
      </item>
-   <item row="1" column="4">
+     <item>
       <widget class="QRadioButton" name="apply_selection_checkbox">
        <property name="toolTip">
         <string>&lt;p&gt;Show items only if they appear in the
@@ -103,6 +112,8 @@
        </property>
       </widget>
      </item>
+    </layout>
+   </item>
    <item row="1" column="0">
     <widget class="QLabel" name="label">
      <property name="text">