Inplace editing logic currently resides only in extended TreeTable class named InplaceEditingTreeTable.

Inplace editing should be made available for list views as well.

Additionally, such logic should be plugged to our base MagnoliaTable/TreeTable, i.e. not using two different TreeTable classes when workbench is editable or not. Setting InplaceEditingTreeTable to non-editable already turns off inplace-editing.