Add Proxy Setup, Build and View to a menu in the Preview/View menu, since the proxy settings are hard to find.
They're both exposed in the Sequencer Sidebar(twice) and in the Preview Sidebar.
If they are collected like this, it will be more simple for users to locate and execute the essential proxy functions from a menu.
Rebuild was previously exposed in the Strip menu, now that has been removed since that would be redundant.
