This is a follow-up task to fix the remaining issues with inplace-editing in trees. In particular:

• Partial updates have a commented-out implementation in InplaceEditingTreeTable. This was disabled because it's not fully stable, i.e. when editing in lazy-loaded rows down the list, it might still break after a bunch (<10) of expand/collapses/edits, with an Internal error showing up.

• When turning inplace-editing on/off, down lazy-loaded rows, cached rows are refreshed (we see the range indicator) and input field may lose focus.