Updates sway.5 to include information on the usage of the `--whole-window` option in the context of the `bindsym` command, which modifies mouse bindings to allow them to operate over the whole window instead of just the titlebar. Also includes the disclaimer about mouse bindings only working over the title bar.
Also fixes the escaping of the `BTN_LEFT` and `BTN_RIGHT` key mention.
Add notes on --border and --exclude-titlebar
Update the flags for bindcode command.