[TECHNICAL-SUPPORT] LPS-23717 Custom scoped portlet title is modified during layout update

Hi,

As Jorge clarified the expected behavior at http://in.liferay.com/web/global.engineering/forums/-/message_boards/message/1357974?p_p_auth=FpOXLny6#_19_message_1379744, here comes the new pull.

###### About my changes
1 - UpdateLayoutAction#updateName is executed on "inline" (means: through the navigation bar) page renaming.
2 - LLSI#updateLayout is executed, when the page is being renamed through the Manage/Page panel (edit_layout.jsp).
3 - I also have modified the updateScopedPortletNames method to have the new logic in we agreed previously.