config: Allow m:* to specify all mouse ids at once

[jyn514]

Previously, each mouse input device had to be specified explicitly in the config file. Now, all mice can be specified at once using m:*. To avoid backwards compatibility issues, * retains its existing meaning of "all keyboard devices".

To avoid capturing our own mouse output, the virtual pointer device is now marked as virtual (previously only the virtual keyboard was marked as virtual).

[jyn514]

i would like to add tests for this, but the test suite fails for me locally even without any changes :/ so it would be kind of difficult for me to make sure my new test passes.

chord-double.t: PASSED
WARNING: Insufficient output, timing out one more time...
chord-hold.t: ERROR: Extraneous keys.
Input:
a down
b down
199ms
x down
x up
a up
b up
1ms
a down
b down
200ms
x down
x up
a up
b up

Expected Output:     Output:
a down               a down
b down               b down
x down               x down
x up                 x up
a up                 a up
b up                 b up
control down         a down
x down               b down
x up                 x down
control up           x up
                     a up
                     b up

[lobre]

Should a mention be made in the manpage?

[jyn514]

good call! done :)