Add mouse gestures
Add mouse gestures using GtkEventControllerMotion
| Action | Gesture |
|---|---|
| Go back one page | Move left |
| Go forward one page | Move right |
| Open a new tab | Move down |
| Reload the page | Move up, then down |
| Close current tab | Move down, then right |
Fixes: #100 (closed)
Edited by Jan-Michael Brummer