examples/button/Base: opening the menu list does no longer allow using the arrow keys to navigate right away

[tobiu]

• looks like a regression bug to me. might be related to the main.addon.Navigator introduction
• most likely just a missing focus() call

[soumajit23]

Hello @tobiu , I would like to work on this issue.

[tobiu]

hi @soumajit23,

while contributions are welcome, i am afraid that this ticket is way too difficult for a first item to work on. you could easily spend a full week on it, since it requires in depth knowledge about the framework mechanics and change history.

My first thought was that it is related to @ThorstenRaab's commit, where he removed the focus() call when showing the button menu:
342afbb#diff-e2256fc11cf65d84943c3bd398132cb7e134ddba3a4af65cda9234874bf93b58R547

(i have no clue why this commit had no ticket and description, since it did breaks things)

digging deeper, it is definitely also related to @ExtAnimal's changes on selection models (separating selections and focus of items).

best regards,
tobias

[soumajit23]

@tobiu thank you for clarifying! Looking into it, I see that it is definitely quite difficult to work on. I suppose I will look into other issues to work on for the time being.