Volume does not increment in 10% steps as expected

[Edward Hart-Davis]

Windows 10 build 1511. This doesn't feel right. See file attached (hopefully)

[Riot]

This is related to #276, and floating point conversions on (crappy) platforms producing unpredictable results.

[Riot]

tweaking volume increment and decrement logic to be closer to the underlying type and show round number increments, resolves #292, re #276

→ <<cset a32370f8d18f>>

[Riot]

fix music volume button, resolves #298, re #292 and #276

→ <<cset 8e3d47b318c8>>

[Riot]

Removing milestone: Beta (automated comment)