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: