Command Buttons in the Editor Window

[a2937]

It would be a lot easier for users aren't familiar with Visual Studio's command palette to edit subtitles if there were command buttons available on the editor. Just one click and boom; the command is ran. And all command buttons should only be visible when a subtitle file is opened in the editor; otherwise those icons shouldn't be visible. Ideally all icons would be 16 by 16 svg images.