https://bugs.webkit.org/show_bug.cgi?id=84244

Reviewed by Vsevolod Vlasov.

Overlay logic is well separable from the scripts panel and does not belong there.
Extracting it into a separate class.

* inspector/front-end/ScriptsNavigator.js:
(WebInspector.ScriptsNavigatorController.prototype.wasShown):
(WebInspector.ScriptsNavigatorController.prototype._createNavigatorControlButton):
(WebInspector.ScriptsNavigatorController.prototype._escDownWhileNavigatorOverlayOpen):
(WebInspector.ScriptsNavigatorController.prototype._toggleNavigator):
(WebInspector.ScriptsNavigatorController.prototype._hidePinnedNavigator):
(WebInspector.ScriptsNavigatorController.prototype.set _pinNavigator):
(WebInspector.ScriptsNavigatorController.prototype.set showNavigatorOverlay):
(WebInspector.ScriptsNavigatorController.prototype.hideNavigatorOverlay):
(WebInspector.ScriptsNavigatorController.prototype._navigatorOverlayWasShown):
* inspector/front-end/ScriptsPanel.js:
(WebInspector.ScriptsPanel.prototype.wasShown):
(WebInspector.ScriptsPanel.prototype._editorClosed):
(WebInspector.ScriptsPanel.prototype._editorSelected):
(WebInspector.ScriptsPanel.prototype._scriptSelected):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@114532 268f45cc-cd09-0410-ab3c-d52691b4dbfc