ptr_b

Results 2 issues of ptr_b

### Description of the feature or fix Optimize helium asm code - Blend rgb565 without conversion: Blending function is now the same as `lv_color_16_16_mix` - Remove unnecessary color reload: color...

Add support for multi-touch on Linux evdev Processing multitouch events according to Linux event codes (adding states for slot and mt touch coords and sending them to gesture recognizers).