Moreclicks

The two commits in this merge request would allow the user to set up as many as eight extra custom actions via tint2rc.

I've been running these changes (minus the up/down wheel actions) for many months without any obvious issues, mainly to adjust laptop screen brightness via a couple of scripts.

I've just tested the wheel actions and they appeared to work fine. The clock commit should solve issue #505.

I have merely augmented the work of two other people, and appropriate credits/references are indicated in the individual commit messages.

See merge request !5

This reverts commit 7162c5de.

This reverts commit b99c5c20.

This reverts commit 227dc8e4.