Multiple item conditional styles (#3017)

Conditional Styles for multiple items #3076

* Preview condition styles on selecting that condition or one of it's styles
Do not evaluate conditional styles in edit mode

* Conditions styling tweaked

- Condition match `is-current` styling for browse and edit modes;
- Disallowed pointer events on Conditions to prevent selection in
Inspector when not editing;

* Highlight current condition in conditionSet view

* Addresses review comments.

* Condition matching highlighting tweaked

- Enable match highlighting during Editing;
- Tweaks to `is-current` styling;

* Don't reset the callback on destroy

* Combine multiple and single selection styling of objects

* Fix issue with applying styles in edit mode

* Fix item styles bug

* Remove comment

* Adds back visibility toggle

* Set isEditing on initialization.

* Addresses review comments - removes use of lodash.

Co-authored-by: charlesh88 <charlesh88@gmail.com>
Co-authored-by: Deep Tailor <deep.j.tailor@nasa.gov>

src/plugins/condition/StyleRuleManager.js

@@ -29,6 +29,7 @@ export default class StyleRuleManager extends EventEmitter {
         this.callback = callback;
         if (suppressSubscriptionOnEdit) {
             this.openmct.editor.on('isEditing', this.toggleSubscription.bind(this));
+            this.isEditing = this.openmct.editor.editing;
         }
         if (styleConfiguration) {
             this.initialize(styleConfiguration);
@@ -156,7 +157,6 @@ export default class StyleRuleManager extends EventEmitter {
         }
         delete this.stopProvidingTelemetry;
         this.conditionSetIdentifier = undefined;
-        this.isEditing = undefined;
     }
 
 }