Ikoka Stick: Use new UI, make repeater & room server work

* Enable the new UI on the BLE and USB Companion roles.
* Fix compilation issues with the repeater and room server roles.
* Remove ESP32-related alternate pinout cruft from the NRF build tree.
* build.sh: add build-matching-firmwares command to allow e.g. building
  all roles for a given variant by passing the variant name.

variants/ikoka_stick_nrf/target.cpp

@@ -6,6 +6,7 @@ ikoka_stick_nrf_board board;
 
 #ifdef DISPLAY_CLASS
   DISPLAY_CLASS display;
+  MomentaryButton user_btn(PIN_USER_BTN, 1000, true);
 #endif
 
 RADIO_CLASS radio = new Module(P_LORA_NSS, P_LORA_DIO_1, P_LORA_RESET, P_LORA_BUSY, SPI);