Web Inspector: no way to navigate from Resource tree element to its entry in Network Tab

Web Inspector: no way to navigate from Resource tree element to its entry in Network Tab
https://bugs.webkit.org/show_bug.cgi?id=179328
<rdar://problem/35367294>

Reviewed by Brian Burg.

* Localizations/en.lproj/localizedStrings.js:
New reveal in network tab string.

* UserInterface/Base/Main.js:
(WI.isShowingNetworkTab):
Utility to know if the network tab is showing.

* UserInterface/Views/ContextMenuUtilities.js:
(WI.appendContextMenuItemsForSourceCode):
(showResourceWithOptions):
(WI.appendContextMenuItemsForURL):
Generalize context menus for just a URL.

* UserInterface/Views/TabBrowser.js:
(WI.TabBrowser.prototype.bestTabContentViewForRepresentedObject):
Support more tab ignore options, this is starting to get icky. We may want to
move to just a preferredTab approach, since that is what some of these want.

* UserInterface/Views/DOMTreeElement.js:
(WI.DOMTreeElement.prototype._populateTagContextMenu):
Make use of new ContextMenu utility to add menu items for a URL.

* UserInterface/Views/NetworkTabContentView.js:
(WI.NetworkTabContentView.prototype.showRepresentedObject):
* UserInterface/Views/NetworkTableContentView.js:
(WI.NetworkTableContentView.prototype.showRepresentedObject):
Handle showing a Resource in the NetworkTab. We immediately show
the details view for it, otherwise we fallback to the list view.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@224508 268f45cc-cd09-0410-ab3c-d52691b4dbfc