bug#52685: 29.0.50; Horizontal scrolling doesn't work when compiled with pgtk

[Andrey Listopadov]

Sorry again, should have tested it a bit better before replying. On current master the scroll is not only inversed, it is also super slow and works only in the active window. Previously inactive windows were scrollable on per line basis (e.g. not by pixels), now it is required to focus a window for scrolling.  Am I missing some setting?