Overlay Service - rewritten/redesigned in Vue (#2190)

* modify overlay service to accept bottomBarButtons option, working annotate on snapshot view

* working blocking message

* move blocking message to overlay service

* return dismiss function on show

* added jsdocs for overlayService

* added progress bar, with setter and getter functions

* make reviewer requested changes

* re-overhaul of overlayAPI

* Integrate work in dialog-service-vue-style

- Markup in DialogComponent and OverlayComponent now up to date;
- Colors, constants;
- Notebook entry now passes correct buttons config;
- New bg data URIs added;
- u-icon-bg-* classes added to global.scss;

* Added deprecation comments to .vue files

* Removed styles from deprecated file

* Temp restore of CSS so that dialog doesn't break.

* remove old OverlayService

* Fixed to overlay CSS

- Fixed large, small, fit sizes;
- Added margin to overlay buttons;
- Code cleanup;

* Remove unused constants

* Tweak styles for __close-button

* Code cleanup

* small cleanup

* wip progressDialog

* Progress bar fixed and Vue-ized

- Markup, styles;
- Constants moved from theme files into _constants.scss;

* added jsdocs to new Overlay API

* remove unused example function

* use progressBar.vue in NotificationBanner.vue, wire up the maximize method with progressDialog and Dialog from OverlayAPI

* Styling in progress for status message banners

* openmct members are camelCase

* Remove unimplemented/unused apis

src/api/api.js

@@ -25,8 +25,6 @@ define([
     './objects/ObjectAPI',
     './composition/CompositionAPI',
     './types/TypeRegistry',
-    './ui/Dialog',
-    './ui/GestureAPI',
     './telemetry/TelemetryAPI',
     './indicators/IndicatorAPI',
     './notifications/NotificationAPI',
@@ -37,8 +35,6 @@ define([
     ObjectAPI,
     CompositionAPI,
     TypeRegistry,
-    Dialog,
-    GestureAPI,
     TelemetryAPI,
     IndicatorAPI,
     NotificationAPI,
@@ -48,9 +44,7 @@ define([
         TimeAPI: TimeAPI,
         ObjectAPI: ObjectAPI,
         CompositionAPI: CompositionAPI,
-        Dialog: Dialog,
         TypeRegistry: TypeRegistry,
-        GestureAPI: GestureAPI,
         TelemetryAPI: TelemetryAPI,
         IndicatorAPI: IndicatorAPI,
         NotificationAPI: NotificationAPI.default,