Description:
Pressing ALT+DOWN on a column allows to create a Selection List of values already inserted into the current column and to select a value from the list. Current version LibreOffice does *not* allow to select a value from the selection list using DOWN key. Using DOWN key just inserts the 1st entry from the list generated by ALT+DOWN. To select another value from the list, mouse needs to be used.

Steps to Reproduce:
1. Open an empty Calc sheet
2. Add some items into let's say the first nine rows (cells A1 throuh A9)
3. Move to cell A10
4. Type ALT+DOWN to create the Selection List
5. Use key DOWN and try to select any value other than the first one


Actual Results:
No other than the first value from the Selection List can be selected when using DOWN key (in fact it doesn't seem to be a user selection)

Expected Results:
Any value from the the Selection List can be selected when using DOWN key


Reproducible: Always


User Profile Reset: Yes



Additional Info:
Bug appears in

Version: 6.4.0.3,Build-ID: b0a288ab3d2d4774cb44b62f04d5d28733ac6df8
CPU-Threads: 8; BS: Linux 4.12; UI-Render: Standard; VCL: kf5; Gebietsschema: de-DE (de_DE.UTF-8); UI-Sprache: de-DE, Calc: threaded

Version: 7.0.0.0.alpha0+,Build-ID: fe75ce648c53e641048fe1fcd416868b784860e5
CPU-Threads: 4; BS: Linux 4.12; UI-Render: Standard; VCL: kf5; 
TinderBox: Linux-rpm_deb-x86_64@86-TDF, Branch:master, Time: 2020-02-12_04:56:37
Gebietsschema: de-DE (de_DE.UTF-8); UI-Sprache: de-DE,Calc: threaded

It does not appear in:

Version: 6.3.4.2,Build-ID: 60da17e045e08f1793c57c00ba83cdfce946d0aa
CPU-Threads: 4; BS: Linux 4.12; UI-Render: Standard; VCL: kde5; 
Gebietsschema: de-DE (de_DE.UTF-8); UI-Sprache: de-DE, Calc: threaded

Version: 6.2.8.2, Build-ID: f82ddfca21ebc1e222a662a32b25c0c9d20169ee
CPU-Threads: 4; BS: Linux 4.12; UI-Render: Standard; VCL: kde5; 
Gebietsschema: de-DE (de_DE.UTF-8); UI-Sprache: de-DE, Calc: threaded 

Version: 6.1.6.3, Build-ID: 5896ab1714085361c45cf540f76f60673dd96a72
CPU-Threads: 4; BS: Linux 4.12; UI-Render: Standard; VCL: gtk2; 
Gebietsschema: de-DE (de_DE.UTF-8); Calc: group threaded