Add user selectable Gamma

Add panel visualisation (@ewoudwijma, #3090)

Bugfix:
- PIR onStateChange() ignored until inited
- remove matrix orientation
- ignore removing ledmap 0 if 2D
- _globalLeds size

usermods/PIR_sensor_switch/usermod_PIR_sensor_switch.h

@@ -375,6 +375,7 @@ public:
    * onStateChanged() is used to detect WLED state change
    */
   void onStateChange(uint8_t mode) {
+    if (!initDone) return;
     DEBUG_PRINT(F("PIR: offTimerStart=")); DEBUG_PRINTLN(offTimerStart);
     if (PIRtriggered && offTimerStart) {
       // checking PIRtriggered and offTimerStart will prevent cancellation upon On trigger