I am used to type Ctrl + PgUp and Ctrl + PgDn in many of my applications (firefox, terminal, thunderbird, ...) to navigate between tabs.
This worked fine in Thunderbird (to switch between emails and calendars mainly) until a recent update : when the focus is on the left pane showing my email accounts typing Ctrl + PgUp or Ctrl + PgDn scrolls down or up inside the folder pane instead of switching tabs.
I already spent hours trying to fix that without success mainly trying ad-ons. So my question is : does anyone know how can I remove this scrolling shortcut on Ctrl + PgUp or Ctrl + PgDn in the folder pane ?
NumLockon, the behaviour is the same for me : If something is selected in the folder pane and it has focus, then the shortcut scrolls into this pane instead of moving to next/previous tab.