When scrolling really fast, the delta value could increase, which leads to incorrect trackpad detection, because the delta value is not consistent over consecutive scroll events
In case the previous page in the history should be ignored, the back button just went back to the root page (library).
Instead, it should try to go back to the next page in the history until there is no page to go back to anymore.
A forced refresh is only necessary in case the webui was already loaded and thus, still uses outdated files from the old version.
In case the app just got freshly opened in a tab, a refresh is not necessary because the latest files are already being used.
In that case, just show an update dialog which won't force a tab refresh.
