Lock views and prevent editing (#3094)

* working lock and unlock

* prevent flexible layout drop hints from showing

* fix lint issue

* wip

* disable mousedown when not editing in DisplayLayout

* continued wip

* Cherrypick new glyphs from add-new-glyphs-062320

* More new glyphs, updated art

- New glyphs: icon-unlocked and icon-target;
- Updated art for icon-lock glyph;

* Edit toggle refinements WIP

- Markup, CSS in BrowseBar.vue;

* More new glyphs, updated art

- New glyphs: icon-unlocked and icon-target;
- Updated art for icon-lock glyph;

* Edit toggle refinements

- Replaced toggle switch with button;

* prevent styling changes when locked

* fix lint issues

* fix tests

* make reviewer suggested changes

Co-authored-by: charlesh88 <charlesh88@gmail.com>

platform/import-export/src/actions/ImportAsJSONAction.js

@@ -216,8 +216,14 @@ define(['zepto', 'objectUtils'], function ($, objectUtils) {
     };
 
     ImportAsJSONAction.appliesTo = function (context) {
-        return context.domainObject !== undefined &&
-            context.domainObject.hasCapability("composition");
+        let domainObject = context.domainObject;
+
+        if (domainObject && domainObject.model.locked) {
+            return false;
+        }
+
+        return domainObject !== undefined &&
+            domainObject.hasCapability("composition");
     };
 
     return ImportAsJSONAction;