0.3.0

What's new:

1. Add ability to ease set custom backlight in Config file
2. Show time before autofinish of view
3. Add preview to modes, while switch them
4. Add modes for split grading
5. Add mechanism of melody notifications (there is 3 build in notification melody)
6. Add ability to set notification for doing something in mask mode
7. Make log view default for tests
8. Decrease firmware size via EncButton instruction
9. Pause printing by press and start only by clicking start btn in Print mode

What fixed:

1. Fix time alignment, while set time in mask mode
2. Remove useless guessing of second mask
3. Reset showing of log while switch modes
4. Disable click handling if we fast tap mode btn and turn encoder (thank you for new release of EncButton by AlexGyver for that!)