Update main/res/values-pl/strings.xml
Update main/res/values-pl/strings.xml

This part of work is up to Main Screen section. I was comparing with English strings.xml - I corrected some translations and I added and translated new phrases which were missing in Polish translation file.
brok85/cgeo,yummy222/cgeo,madankb/cgeo,brok85/cgeo,marco-dev/c-geo-opensource,Huertix/cgeo,marco-dev/c-geo-opensource,lewurm/cgeo,madankb/cgeo,samueltardieu/cgeo,kumy/cgeo,auricgoldfinger/cgeo,KublaikhanGeek/cgeo,auricgoldfinger/cgeo,yummy222/cgeo,Bananeweizen/cgeo,kumy/cgeo,Huertix/cgeo,superspindel/cgeo,ThibaultR/cgeo,mucek4/cgeo,SammysHP/cgeo,mucek4/cgeo,cgeo/cgeo,cgeo/cgeo,KublaikhanGeek/cgeo,tobiasge/cgeo,Bananeweizen/cgeo,lewurm/cgeo,rsudev/c-geo-opensource,auricgoldfinger/cgeo,vishwakulkarni/cgeo,lewurm/cgeo,Huertix/cgeo,tobiasge/cgeo,S-Bartfast/cgeo,matej116/cgeo,S-Bartfast/cgeo,brok85/cgeo,rsudev/c-geo-opensource,vishwakulkarni/cgeo,SammysHP/cgeo,xiaoyanit/cgeo,schwabe/cgeo,Bananeweizen/cgeo,yummy222/cgeo,schwabe/cgeo,xiaoyanit/cgeo,mucek4/cgeo,marco-dev/c-geo-opensource,ThibaultR/cgeo,pstorch/cgeo,rsudev/c-geo-opensource,samueltardieu/cgeo,schwabe/cgeo,S-Bartfast/cgeo,KublaikhanGeek/cgeo,schwabe/cgeo,vishwakulkarni/cgeo,cgeo/cgeo,cgeo/cgeo,matej116/cgeo,tobiasge/cgeo,SammysHP/cgeo,samueltardieu/cgeo,pstorch/cgeo,pstorch/cgeo,xiaoyanit/cgeo,kumy/cgeo,ThibaultR/cgeo,superspindel/cgeo,madankb/cgeo,superspindel/cgeo,matej116/cgeo