open_input_window was slightly different for each of them, so it made no sense
to generalize it (then we would end up with a thin and useless wrapper).
This introduces the '-F format' parameter, which takes a format and replaces %s
in it with the user input. An example: The user should enter the target
workspace name. The appropriate i3-input invocation looks like this:
i3-input -F 'workspace "%s"' -P 'Switch to workspace: '
The case of an X11 server having multiple displays is handled correctly by the
code in src/mainx.c. However, due to some functions not being correctly
refactored and still getting the first screen (and also the first root window)
from the XCB connection, i3 was operating on the wrong root window.
Apparantly, after activating numlock once, the numlock modifier
stays turned on (use xev(1) to verify). So, to resolve useful
keysyms, we remove the numlock flag from the event state. What
currently does not work is actually using your keypad.
Commands are 'mark' and 'goto'. Both can be used either directly,
like 'mark a' and 'goto a', or interactively (just 'mark'). For
interactive mode, i3-input must be installed and in your PATH.
