diff --git a/src/calibre/gui2/preferences/toolbar.ui b/src/calibre/gui2/preferences/toolbar.ui
index 2bb9547b3e..6dbbb79f2e 100644
--- a/src/calibre/gui2/preferences/toolbar.ui
+++ b/src/calibre/gui2/preferences/toolbar.ui
@@ -40,7 +40,16 @@
    <item>
     <widget class="QWidget" name="actions_widget" native="true">
      <layout class="QHBoxLayout" name="horizontalLayout_2">
-      <property name="margin">
+      <property name="leftMargin">
+       <number>0</number>
+      </property>
+      <property name="topMargin">
+       <number>0</number>
+      </property>
+      <property name="rightMargin">
+       <number>0</number>
+      </property>
+      <property name="bottomMargin">
        <number>0</number>
       </property>
       <item>
@@ -58,7 +67,7 @@
             </sizepolicy>
            </property>
            <property name="selectionMode">
-            <enum>QAbstractItemView::MultiSelection</enum>
+            <enum>QAbstractItemView::ExtendedSelection</enum>
            </property>
            <property name="iconSize">
             <size>
@@ -152,7 +161,7 @@
             </sizepolicy>
            </property>
            <property name="selectionMode">
-            <enum>QAbstractItemView::MultiSelection</enum>
+            <enum>QAbstractItemView::ExtendedSelection</enum>
            </property>
            <property name="iconSize">
             <size>