[RJA-2022] [ feature] - Drop down with predefined key should memorize selected value
[RJA-2021] [fix] - Button "Add predefined key" should appear every time key was removed
[RJA-2021] [fix] - Button "Add predefined key" should appear every time key was removed
Merge pull request #901 from rsvato/master

[RJA-2022] [fix] - Restore selected values when rerendering properties