Linux users: fix for filament manager and project blank page

Hi, if like me you use Bambu Studio under Linux and see a blank page for the home, the filament manager and project pages, this is caused by a bug in webkit buffering. This happens mostly to nvidia users.

There is a fix for it, which is to launch bambu-studio (or bambustudio) executable with this environemnt variable set:

$ WEBKIT_DISABLE_DMABUF_RENDERER=1 bambu-studio

In a desktop environment like KDE/Plasma you can set the variable in the launcher menu, so that you do not have to type this every time you launch Bambustudio.