SearchToolbar: Add Ctrl+G and Ctrl+Shift+G shortcuts

Closes #1688

src/lib/webtab/searchtoolbar.ui

@@ -64,6 +64,9 @@
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
+     <property name="shortcut">
+      <string>Ctrl+Shift+G</string>
+     </property>
      <property name="autoRaise">
       <bool>true</bool>
      </property>
@@ -77,6 +80,9 @@
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
+     <property name="shortcut">
+      <string>Ctrl+G</string>
+     </property>
      <property name="autoRaise">
       <bool>true</bool>
      </property>
@@ -85,7 +91,7 @@
    <item>
     <widget class="MacToolButton" name="caseSensitive">
      <property name="text">
-      <string>Case sensitive</string>
+      <string>&amp;Match Case</string>
      </property>
      <property name="checkable">
       <bool>true</bool>