ColumnMnemonicCharTTV property is used in NodeTableModel to define mnemonics to individual columns.
Since now we should change mnemonics handling from 2 key/value to '&' method (see #86438), we need a way how to do that
for table columns.
imho, the treetableview is a different issue - the column name has no mnemonic and the mnemonic appears in 'change
visible columns' dialog box only. so there would have to be two names, one without mnemonic for table header and one
with mnemonic for the checkbox anyway
pls reopen if you think otherwise
I do not see a reason why there would have to be two keys. See
I'm not able to fix issue #109750 until this is changed. And the change is required by issue #86438.
fixed, see #120553