Fixing active cell selection
Don't semi-hide cells in editing mode
Don't change cells in edit mode
More or less the actual edit workflow
Cleaning up some of the interactions
Fixing play/pause icon
Hiding edit controls in playback mode
Fixing 'mark end' keyboard shortcut
Mode toggle button
Some more misc fixes
a few more little tweaks
Renaming testing notebook
Whoops, renaming nb
s/playing/pausd