Web Inspector: Dialogs style and DialogDelegate interface fixes.

Web Inspector: Dialogs style and DialogDelegate interface fixes.
https://bugs.webkit.org/show_bug.cgi?id=76449

Reviewed by Pavel Feldman.

* inspector/front-end/Dialog.js:
(WebInspector.Dialog):
(WebInspector.Dialog.currentInstance):
(WebInspector.Dialog.show):
(WebInspector.Dialog.hide):
(WebInspector.Dialog.prototype._hide):
(WebInspector.Dialog.prototype._onGlassPaneFocus):
(WebInspector.Dialog.prototype._onFocus):
(WebInspector.Dialog.prototype._position):
(WebInspector.Dialog.prototype._onKeyDown):
(WebInspector.DialogDelegate.prototype.wasShown):
(WebInspector.DialogDelegate.prototype.position):
(WebInspector.DialogDelegate.prototype.focus):
(WebInspector.DialogDelegate.prototype.onEnter):
(WebInspector.DialogDelegate.prototype.willHide):
* inspector/front-end/GoToLineDialog.js:
(WebInspector.GoToLineDialog):
(WebInspector.GoToLineDialog.prototype.focus):
(WebInspector.GoToLineDialog.prototype._onGoClick):
(WebInspector.GoToLineDialog.prototype._applyLineNumber):
(WebInspector.GoToLineDialog.prototype.onEnter):
* inspector/front-end/dialog.css:
(.dialog):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@105156 268f45cc-cd09-0410-ab3c-d52691b4dbfc