Fix dynamically compiled test cases disappearing from old assembly
Fix dynamically compiled test cases disappearing from old assembly

I kept the behaviour the same, where it deletes the dynamically compiled tests (and the dropdown entry for the dynamic assembly) when switching back to a "statically" compiled test.
Tom94/osu-framework,ppy/osu-framework,EVAST9919/osu-framework,Tom94/osu-framework,ZLima12/osu-framework,peppy/osu-framework,peppy/osu-framework,default0/osu-framework,EVAST9919/osu-framework,default0/osu-framework,EVAST9919/osu-framework,ppy/osu-framework,smoogipooo/osu-framework,smoogipooo/osu-framework,DrabWeb/osu-framework,DrabWeb/osu-framework,ZLima12/osu-framework,DrabWeb/osu-framework,ppy/osu-framework,peppy/osu-framework,Nabile-Rahmani/osu-framework,EVAST9919/osu-framework,Nabile-Rahmani/osu-framework