Grbl over tcp fluidnc

[PSIAlt]

I was struggling to connect FluidNC over WIFI because GrIP is different protocol than a plain GRBL sent over TCP (which is used by FluidNC).
So there's the fix, now we support both, and make clarifications in buttons in protocol select box.

[Schildkroet]

Hello,

There is an error with heightmap:

../src/frmmain_heightmap.cpp: At global scope:
../src/frmmain_heightmap.cpp:104:6: error: redefinition of ‘bool frmMain::hasHeightmapData()’
  104 | bool frmMain::hasHeightmapData()
      |      ^~~~~~~
../src/frmmain_heightmap.cpp:60:6: note: ‘bool frmMain::hasHeightmapData()’ previously defined here
   60 | bool frmMain::hasHeightmapData()
      |      ^~~~~~~
../src/frmmain_heightmap.cpp:115:35: error: redefinition of ‘frmMain::HeightmapPreflightResult frmMain::maybePromptEnableHeightmapBeforeRun()’
  115 | frmMain::HeightmapPreflightResult frmMain::maybePromptEnableHeightmapBeforeRun()
      |                                   ^~~~~~~
../src/frmmain_heightmap.cpp:71:35: note: ‘frmMain::HeightmapPreflightResult frmMain::maybePromptEnableHeightmapBeforeRun()’ previously defined here
   71 | frmMain::HeightmapPreflightResult frmMain::maybePromptEnableHeightmapBeforeRun()
      |                                   ^~~~~~~
../src/frmmain_heightmap.cpp:115:10: error: ‘enum frmMain::HeightmapPreflightResult’ is private within this context
  115 | frmMain::HeightmapPreflightResult frmMain::maybePromptEnableHeightmapBeforeRun()
      |          ^~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../src/frmmain_heightmap.cpp:21:
../src/frmmain.h:323:10: note: declared private here
  323 |     enum HeightmapPreflightResult { HmProceedRun, HmEnableButDoNotRun, HmCancel };