screenShield: Forward key presses to tne entry when raising the shield

https://bugzilla.gnome.org/show_bug.cgi?id=686740

js/gdm/loginDialog.js

@@ -1166,5 +1166,9 @@ const LoginDialog = new Lang.Class({
         this.parent();
 
         Main.ctrlAltTabManager.removeGroup(this.dialogLayout);
-    }
+    },
+
+    addCharacter: function(unichar) {
+        this._promptEntry.clutter_text.insert_unichar(unichar);
+    },
 });

js/ui/screenShield.js

@@ -601,6 +601,10 @@ const ScreenShield = new Lang.Class({
             return false;
 
         this._ensureUnlockDialog(true, true);
+
+        if (GLib.unichar_isgraph(unichar))
+            this._dialog.addCharacter(unichar);
+
         this._liftShield(true, 0);
         return true;
     },

js/ui/unlockDialog.js

@@ -300,4 +300,8 @@ const UnlockDialog = new Lang.Class({
 
         this.destroy();
     },
+
+    addCharacter: function(unichar) {
+        this._promptEntry.clutter_text.insert_unichar(unichar);
+    },
 });