Renamed confusing setter functions.
Fixed bug in output slider widget, which did not invert the
slider when the actuator min and max values were inverted.
Merge pull request #729 from kubark42/config-output-fixes

Config output fixes
tree: move firmware targets under a new per-target container dir
tree: mv board-info.mk files under board-specific directories
tree: relocate board_hw_defs files into board-specific directories
tree: auto-discover targets in the flight directory
tree: move pios_board.h variants to board-specific directories
tree: move cmsis system_* board files to board-specific directories
tree: move hardware docs to board-specific directories
tree: move gdb config files to board-specific directories