fixes #4384 - keep list position also at context / drop cache
fixes #4384 - keep list position also at context / drop cache

tobiasge/cgeo,Bananeweizen/cgeo,xiaoyanit/cgeo,vishwakulkarni/cgeo,Huertix/cgeo,madankb/cgeo,vishwakulkarni/cgeo,KublaikhanGeek/cgeo,marco-dev/c-geo-opensource,samueltardieu/cgeo,cgeo/cgeo,Bananeweizen/cgeo,S-Bartfast/cgeo,ThibaultR/cgeo,SammysHP/cgeo,rsudev/c-geo-opensource,kumy/cgeo,madankb/cgeo,xiaoyanit/cgeo,vishwakulkarni/cgeo,KublaikhanGeek/cgeo,Huertix/cgeo,brok85/cgeo,SammysHP/cgeo,kumy/cgeo,superspindel/cgeo,mucek4/cgeo,schwabe/cgeo,pstorch/cgeo,cgeo/cgeo,tobiasge/cgeo,Bananeweizen/cgeo,mucek4/cgeo,cgeo/cgeo,SammysHP/cgeo,auricgoldfinger/cgeo,lewurm/cgeo,kumy/cgeo,rsudev/c-geo-opensource,matej116/cgeo,madankb/cgeo,S-Bartfast/cgeo,schwabe/cgeo,superspindel/cgeo,brok85/cgeo,xiaoyanit/cgeo,auricgoldfinger/cgeo,auricgoldfinger/cgeo,Huertix/cgeo,samueltardieu/cgeo,matej116/cgeo,rsudev/c-geo-opensource,lewurm/cgeo,ThibaultR/cgeo,marco-dev/c-geo-opensource,mucek4/cgeo,yummy222/cgeo,S-Bartfast/cgeo,matej116/cgeo,KublaikhanGeek/cgeo,pstorch/cgeo,yummy222/cgeo,schwabe/cgeo,schwabe/cgeo,yummy222/cgeo,samueltardieu/cgeo,marco-dev/c-geo-opensource,ThibaultR/cgeo,brok85/cgeo,superspindel/cgeo,lewurm/cgeo,tobiasge/cgeo,cgeo/cgeo,pstorch/cgeo