Custom css themes shouldn't be too difficult. Probably pass in a url parameter for the them you want and then handle it in the template. Night mode has been requested.

Describe the bug
When trying to use the swipe gestures to change tab/open the tab switcher I was unable to and was able to swipe it off the screen

Expected behavior

The toolbar should not be capable of being swiped up and the swipe gestures should work

Screenshots

The wikipedia api provides a section an id (1 upwards), it'd be nice if that would also be included.

Example: https://en.wikipedia.org/w/api.php?format=xml&action=parse&prop=sections&page=License

Use new presets

I recently installed Kiwix 2.1.1 (2.1.4) on macOS 10.15.5. I loaded a Wikipedia (and only one), all went well.

Closed Kiwix. Re-opened it. Nothing in the list. Opened that same Wikipedia, it now shows twice in the list.

Closed Kiwix. Re-opened it. Nothing in the list. Opened that same Wikipedia, it now shows twice in the list. Repeat as long as you wish.

Certainly not a show-stopper, but