This is a general usability preference rather than a specific dialog. During metadata operations like retrieve and delete I'm blocked from the editor by a modal progress bar. There's always something I can be working on. It'd be like if I had to wait for compile to work on another file. My preference would be a dedicated service window that visualizes operations like the test runner and notifies me with a toast about failures. MM is okay at this. There are times when it disconcertingly quietly fails.
Issue #186 resolved