https://bugs.webkit.org/show_bug.cgi?id=81898

Reviewed by Vsevolod Vlasov.

This change allows popover while in-edit mode, hides it upon Esc. It also introduces anchorOverride
concept in ObjectPopoverHelper that allows dynamically switching the anchor (say if we want to highlight anchor itself).

* inspector/front-end/DetailedHeapshotView.js:
* inspector/front-end/ElementsPanel.js:
* inspector/front-end/JavaScriptSourceFrame.js:
(WebInspector.JavaScriptSourceFrame.prototype._resolveObjectForPopover.showObjectPopover):
(WebInspector.JavaScriptSourceFrame.prototype._resolveObjectForPopover):
(WebInspector.JavaScriptSourceFrame.prototype._onKeyDown):
* inspector/front-end/NetworkPanel.js:
* inspector/front-end/ObjectPopoverHelper.js:
(WebInspector.ObjectPopoverHelper.prototype._showObjectPopover.showObjectPopover.):
(WebInspector.ObjectPopoverHelper.prototype._showObjectPopover):
* inspector/front-end/Popover.js:
(WebInspector.PopoverHelper.prototype.isPopoverVisible):
* inspector/front-end/TimelinePanel.js:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@111676 268f45cc-cd09-0410-ab3c-d52691b4dbfc