Qform (the popup text entry thing) is currently only used as a single
modal text input, but the TUI code still went through the motions of
setting each one up as if it could have a variety of things inside of
it. This commit saves on repeated code by providing a wrapper that does
the thing we want, but still leaves the door open in the future for
having other types of inputs in the form.
It also renames a few Qform functions for consistency.
ged_mouse_event() is never called when building with --no-mouse or when
defining FEAT_NOMOUSE. This could cause compilers to issue a warning.
This commit adds the ORCA_OK_IF_UNUSED decoration to ged_mouse_event(),
which should suppress the warning on most compilers. This intentionally
leaves the code compiled in. This is to avoid interleaving more ifdefs
than necessary into the code and making development and compile-time
errors more difficult to deal with.
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