IDE 1.2.73 VM 234

IDE
- Update help strings and links (thanks, Turgut!)
- Move millisecondsSince/microsecondsSince into Input palette as advanced blocks
- Add "BLE connected" block to the Input palette

VM
- Fix: make primMSecsSince return duration in milliseconds, not seconds
- Make BLE Serial (Nordic UART) service always available when BLE is enabled
- Allow primI2cRead() to read into byte arrays, as well as lists (when this primitive was first implemented MicroBlocks did not yet have byte arrays)

Libraries
- Improve pseudorandom lib
- Fix: Rhythm lib was missing a variable!
- Remove unused bar loop in Rhythm lib
- Add unique and uniqued to Lists library
- Allow numeric indices in midi control block
- Split ELECFREAKS folder into separate folders in Robots and Kits and Boards
- Add library for the ELECFREAKS Smart Cutebot Pro robot
- Remove uartStart and uartStop primitives from BLE Serial library (no longer needed)
- Remove deprecated HSV Colors library (use Color library instead
- Remove deprecated NeZha library (use Nezha2 library instead) 

Translations
- Updated Catalan translation