Keep the dock visible in the MultitaskingView

Author: leolost2605

protocol/pantheon-desktop-shell-v1.xml

@@ -98,6 +98,12 @@
 
       <arg name="hide_mode" type="uint" enum="hide_mode" summary="hide mode"/>
     </request>
+
+    <request name="request_visible_in_multitasking_view">
+      <description summary="request visible in multitasking view">
+        Tell the shell that the panel would like to be visible in the multitasking view.
+      </description>
+    </request>
   </interface>
 
   <interface name="io_elementary_pantheon_widget_v1" version="1">

protocol/pantheon-desktop-shell.vapi

@@ -47,6 +47,7 @@ namespace Pantheon.Desktop {
         public void focus ();
         public void set_size (int width, int height);
         public void set_hide_mode (Pantheon.Desktop.HideMode hide_mode);
+        public void request_visible_in_multitasking_view ();
     }
 
     [CCode (cheader_filename = "pantheon-desktop-shell-client-protocol.h", cname = "struct io_elementary_pantheon_widget_v1", cprefix = "io_elementary_pantheon_widget_v1_")]

src/MainWindow.vala

@@ -93,6 +93,7 @@ public class Dock.MainWindow : Gtk.ApplicationWindow {
                 panel = desktop_shell.get_panel (wl_surface);
                 panel.set_anchor (BOTTOM);
                 panel.set_hide_mode (settings.get_enum ("autohide-mode"));
+                panel.request_visible_in_multitasking_view ();
             }
         }
     }