Add toggle comment and toggle comment block actions w/ keybindings (#290)

xed/resources/css/xed-style.css

@@ -11,3 +11,14 @@
     min-height: 0;
     min-width: 0;
 }
+
+/*remove a keybinding so that we can use it for toggling comments*/
+@binding-set xed-view-bindings
+{
+    unbind "<Control>slash";
+}
+
+textview
+{
+    -gtk-key-bindings: xed-view-bindings;
+}

xed/resources/ui/xed-shortcuts.ui

@@ -327,6 +327,20 @@
                 <property name="title" translatable="yes">Decrement number at cursor</property>
               </object>
             </child>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">1</property>
+                <property name="accelerator">&lt;ctrl&gt;&lt;shift&gt;slash</property>
+                <property name="title" translatable="yes">Toggle comment block</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">1</property>
+                <property name="accelerator">&lt;ctrl&gt;slash</property>
+                <property name="title" translatable="yes">Toggle comment</property>
+              </object>
+            </child>
           </object>
         </child>
       </object>

xed/resources/ui/xed-ui.xml

@@ -38,6 +38,9 @@
       <menuitem name="EditSelectAllMenu" action="EditSelectAll"/>
       <placeholder name="EditOps_3" />
       <separator/>
+      <menuitem name="EditToggleCommentMenu" action="EditToggleComment"/>
+      <menuitem name="EditToggleCommentBlockMenu" action="EditToggleCommentBlock"/>
+      <separator/>
       <placeholder name="EditOps_4" />
       <separator/>
       <placeholder name="EditOps_5" />