Bug 1601630 - Remove WebConsoleUI evaluateJSAsync. r=jlast.

This method was directly using the main target console front
to evaluate something, which could cause issue in a fission
world.
The function is moved to the WebConsole class, and calls commands
evaluateJSAsync, in which we retrieve the appropriate front
given the given options object (e.g. if there's a selecteObjectActor,
we'll talk to the target that hold the actor).

Differential Revision: https://phabricator.services.mozilla.com/D55986

devtools/client/inspector/markup/markup-context-menu.js

@@ -371,7 +371,7 @@ class MarkupContextMenu {
     const options = {
       selectedNodeActor: this.selection.nodeFront.actorID,
     };
-    const res = await hud.ui.evaluateJSAsync(evalString, options);
+    const res = await hud.evaluateJSAsync(evalString, options);
     hud.setInputValue(res.result);
     this.inspector.emit("console-var-ready");
   }