src: gui: wizard: importdata: CsvPage: Fix bug when selecting multiple times
src: gui: wizard: importdata: CsvPage: Simplify event listening
src: gui: wizard: importdata: CsvPage: Make some widgets invisible in the beginning
src: gui: wizard: importdata: CsvPage: Cleanups and refinements
Add copyright notices with proper authors
Merge branch 'cleanup/importdata' into feat/excel