While most display are widescreen nowadays, some users might not want the dialogs in this layout or rotate the screen and need to save horizontal space. The VT should be optional in this case. Could be a condition at VclBuilder::makeObject() #1861: if (name == "GtkNotebook")
This requires of course to hide the icons. But first of all to not crash the application if the tab label is a subitem of a box.
+1, but should be selectable from Tools -> Options and not expert config. Prefer to move the entire UI to vertical tabs (when a dialog/panel has so many configuration categories to need two rows) for consistency across the UI, having a mix of horizontal tabs (no icon) and vertical tabs (w/icon) would just be confusing.
> +1, but should be selectable from Tools -> Options and not expert config. It is a good idea to build it knowing there might need to be an option for this, but given the amount of options we have already, I personally would not expose the option for now.