[Layout] Support sub-object selection in layout (#1811)

Updates to sub object selection, first cut of selection APIs.

* [API] Add inspector view registry to register inspector view providers and show a view in the inspector.

[API] Modify the selection API to register the click event and handle the event. The API will add a class to the selected object and the immediate parent of the selected object.

[Directive] Implemenet mct-selectable directive for making an element selectable.

[Layout] Update the layout controller to use the Selection API. Also, add double click gesture to allow drilling into a selected object.

Populate the Elements pool with contained elements of the selected object. Update toolbar and inspector to listen for the changes in selection.

* [Frontend] Mods to markup and CSS for sub-object selection

* MCTSelectable allows selection in initialization, use to select on navigation

[Frontend] Show grid in first nested layout, hide from deeper nesting. Only show grids when applicable to relative selection.

* Fix checkstyle and lint errors

* Bring back the change that made mct-init-select work

* [Inspector] Make sure the right content is displayed based on whether a view provider exists or not.

* Only show table options when editing

* Make reviewers' requested changes

* Fix broken tests

* [Frontend] Cleanups and tweaks

Fixes #1811
- Cleanups between frame, editor and selecting.scss;
- Hover and selected borders visually pumped up a bit;
- Solid borders on hover and selecting when browsing;
- Dashed borders for layouts when editing;
- Fixed cursor to only show move capability when
element is selected;

* [Frontend] Tweaks to frame.no-frame layout

Fixes #1811
- Margin set to 0;
- Overflow set to hidden;

* [Frontend] Fixed position items border width fixed

Fixes #1811
- Set to 1px;

* Add tests for inspector controller and fix broken tests. Clean up code.

* [Fixed Position] Stop event propagation on click handlers in fixed position to avoid the event reaching the selection click handlers which caused issues with toolbar and selection."

* Fix tests

* Add tests

* Add test

* Remove element from document

platform/commonUI/general/test/controllers/ObjectInspectorControllerSpec.js

@@ -41,16 +41,6 @@ define(
                     "$scope",
                     ["$watch", "$on"]
                 );
-                mockScope.ngModel = {};
-                mockScope.ngModel.selectedObject = {
-                    getCapability: function () {
-                        return {
-                            listen: function () {
-                                return true;
-                            }
-                        };
-                    }
-                };
 
                 mockObjectService = jasmine.createSpyObj(
                     "objectService",
@@ -77,22 +67,27 @@ define(
                     "location capability",
                     ["isLink"]
                 );
+
                 mockDomainObject.getCapability.andCallFake(function (param) {
                     if (param === 'location') {
                         return mockLocationCapability;
                     } else if (param === 'context') {
                         return mockContextCapability;
+                    } else if (param === 'mutation') {
+                        return {
+                            listen: function () {
+                                return true;
+                            }
+                        };
                     }
                 });
 
+                mockScope.domainObject = mockDomainObject;
                 controller = new ObjectInspectorController(mockScope, mockObjectService);
-
-                // Change the selected object to trigger the watch call
-                mockScope.ngModel.selectedObject = mockDomainObject;
             });
 
             it("watches for changes to the selected object", function () {
-                expect(mockScope.$watch).toHaveBeenCalledWith('ngModel.selectedObject', jasmine.any(Function));
+                expect(mockScope.$watch).toHaveBeenCalledWith('domainObject', jasmine.any(Function));
             });
 
             it("looks for contextual parent objects", function () {