command: split filter changing in two functions

One function sets a raw filter list, the other allows "editing" the
filter list.
command: add vf/af properties
command: make vf and af commands more verbose

On success, print the filter chain on the OSD. Otherwise, show an error
message on the OSD (just enough so that the user knows whether the
command worked).
option: fix inverted --mouseinput option

Also fixes --no-mouseinput.