feat: remove legacy TreeColumns code - now unused#775

Merged

6pac merged 2 commits intonextfrom remove-treecolumn-next

May 17, 2023

+3-329

Commits on May 15, 2023

remove legacy treecolumns code - now unused
6pac
committed

Commits on May 16, 2023

fix typo and add back apparently unnecessary call to setcolumns() which does in fact do crucial refreshing of grid structure
6pac
committed