Feature requests: New actions and multi-gesture

[mustanggb]

Fantastic extension!

Some feature requests:

1. New action "Hard refresh", same as the keyboard shortcut "Ctrl+F5"
2. New action "Stop", same as the keyboard shortcut "Escape"
3. Multi-gesture commands, meaning allow one action to have lots of gestures*

* The reason for 3 is that sometimes when performing a gesture an extra direction or two is detected, so I like to have a few different variations of the the same drawing so it's more often detected as intended.