When creating a page switching edit modes from the edit menu doesn't preserve URL parameters

Multiple use cases for this bug:

• creating a blog post: all parameters are lost ?template=Blog.BlogPostTemplate&parent=Blog.WebHome&title=Test1&Blog.BlogPostClass_0_title=Test1&form_token=OboTXmCNYlRNJm0ExSq0xQ
• creating a color theme: ?template=ColorThemes.ColorThemeTemplate&title=Test, results in creating empty pages, no title
• creating a new page: ?template=&parent=Main.WebHome&title=NewPage, results in orphaned pages and no titles

All parameters are replaced with "?editor=" when we do the change from the contextual action menu.

This happens in general for users that have "advanced menu mode" (logged in with Admin for ex) when they change their mind about the editor to use (they have clicked the default action). Also happened in usability testing with beginner users that wanted to upload an attachment to the page and switched to WYSIWYG for this action.