Add runcam split support, the user can setup runcam split control with mixer in remote control

1. Remove the RunCam split tab
2. Remove the apiVersion check for runcam split control

1. Remove four "rcsplit" msp message codes that are no longer needed
2. Add the name-covert logic for runcam split. When users choose the runcam split as a peripheral, in the Modes tab, the boxes:CAMERA1, CAMERA2, CAMERA3 will rename to CAMERA WI-FI, CAMERA POWER, CAMERA CHANGE MODE.

fix the wrong comments  in adjustRunCamSplitBoxNameWithModeID()

remove the codes and resources that are no longer needed.

cleanup up the codes.

Cleanup

Cleanup

Fix the box name error(POWERE - > POWER)

remove the variables for runcam split that no longer needed.

Add runcam split support, the user can setup runcam split control with mixer in remote control

1. Remove the RunCam split tab
2. Remove the apiVersion check for runcam split control

1. Remove four "rcsplit" msp message codes that are no longer needed
2. Add the name-covert logic for runcam split. When users choose the runcam split as a peripheral, in the Modes tab, the boxes:CAMERA1, CAMERA2, CAMERA3 will rename to CAMERA WI-FI, CAMERA POWER, CAMERA CHANGE MODE.

fix the wrong comments  in adjustRunCamSplitBoxNameWithModeID()

remove the codes and resources that are no longer needed.

cleanup up the codes.

Cleanup

Cleanup

Fix the box name error(POWERE - > POWER)

remove the variables for runcam split that no longer needed.

add apiVersion check for runcam split support(show runcam split peripheral option in Ports tab)

Use 1.3.7 of apiVersion to check whether the runcam split supported

js/msp/MSPHelper.js

@@ -23,7 +23,8 @@ function MspHelper () {
     'ESC_SENSOR': 10,
     'TBS_SMARTAUDIO': 11,
     'TELEMETRY_IBUS': 12,
-    'IRC_TRAMP': 13
+    'IRC_TRAMP': 13,
+    'RUNCAM_SPLIT_CONTROL': 14 // support communitate with RunCam Split
   };
 }