0.01: New App!
0.02: Use Bangle.showClock for changing to clock (Backport from launch)
0.03: Remove app from 'tool' when it has at least one other known tag
      Add tag 'health' for apps like Heart Rate Monitor
0.04: Fix remove handler
0.05: Make the "App source not found" warning less buggy
0.06: Fixed a crash if an app has no tags (app.tags is undefined)
0.07: Clear cached app list when updating showClocks setting