Since we can't read the real_mods and oneshot_mods static variable
directly within the update_user_visualizer_state
function (Threading and serial link). We are know storing the mods
states in the visualizer_keyboard_status_t structure. We can now
display the status of the modifier keys on the LCD display.
Fixed compiler warning by including bootloader.h in keymap_common.c.
Changed FORCE_NKRO to only be applied if NKRO_ENABLE is defined.
Added extra documentation to the template config.h