Improve complication touch targets

[rdnt]

Touch targets should be decoupled from complication rendering bounds, and go all the way to the edge of the screen and further outside of the area of each complication. This will make the complications easier to tap, especially on watches with curved displays (e.g. Pixel Watch).

Additional:

• Add two more 'invisible' complication slots on hours and minutes respectively, offering the possibility of two more application shortcuts. Ref: Missing functionality/suggestions #13

There has been a recent update that allows configuring margins. Could be useful.