ConfigRawParams: Various bugfixes

[robertlong13]

1. Add double buffering to MyDataGridView. Prevents dangerous graphical corruption that can occur when scrolling, causing the name of the parameter you are editing to look like a different parameter. See this example; the CAN_P1_BITRATE parameter is falsely labeled as CAN_LOGLEVEL:
   
2. Fix an off-by-one error on a row-check that broke additional controls, like the bitmask button, on row 1
   
3. Stop the tree view from taking favorites into account:
   

[robertlong13]

@meee1, I'd really like to get this one in. Number-1 in this list can actually be pretty dangerous in the wrong circumstances (like accidentally changing a tuning value when you are trying to change a different nearby parameter).