Similar like MGNLDMS-259 in DMS module:
When opening a category tree in browse mode - one can double-click on items. While this has some advantages, like the fact one can see more details about a category, it also lets them modify the document. Worse, when saving such dialog, the tree refreshes itself in normal mode, i.e with the function bar and all.
To reproduce:

• Go to http://demoauthor.magnolia-cms.com/demo-project/news-and-events.html.
• Edit Contact.
• Click "internal link" to browse.
• Double-click on any contact in the newly opened popup tree.
• Click on Save in the newly opened Contact edit dialog.
• -> The tree popup has been refreshed and now has a semi-broken toolbar.