Added Template editing.

Creating with templates not supported yet.

Templates are listed in Context-Menu under the AddEntry Toolbar
Toolbar Button is missing an Arrow for now. Control-Size is not working correctly for now
Nested Template or Trash groups aren't considered, this is a bug!
Minor changes to the UI (Settings tabs now use common icons)
Added Workflow-Settings tab to extract all the custom action possible on entries. The copy or open on URL dbl-click setting will move over to this tab.

MacPass/MPActionHelper.m

@@ -25,7 +25,8 @@
                    @(MPActionToggleInspector) : @"toggleInspector:",
                    @(MPActionLock) : @"lock:",
                    @(MPActionEmptyTrash) : @"emptyTrash:",
-                   @(MPActionDatabaseSettings) : @"showDatabaseSettings:"
+                   @(MPActionDatabaseSettings) : @"showDatabaseSettings:",
+                   @(MPActionEditTemplateGroup) : @"editTemplateGroup:"
                    };
   });
   return actionDict;