bug(theme): Auto partially updates views, when changing DE color-scheme

[Rudxain]

Describe the bug

#531 (comment)

https://discord.com/channels/1168607797081022514/1171387180409692160/1260638729463402638 :

The background doesn't update if the system theme changes while the program is running
But the widgets do

New repro:

1. Go to Settings
2. Ensure Auto theme is set
3. Change desktop environment theme
4. Click any empty space in the Settings View Focus the window

Expected behavior

Either:

• view shouldn't update colors until switching back-&-forth between views
• full view gets an updated palette

You have a solution?

No response

Provide logs

There's nothing. Only "change setting" events, which only get logged if user changes UAD theme, not DE theme

Acknowledgements

• This issue is not a duplicate of an existing bug report.
• I have chosen an appropriate title.
• All requested information has been provided properly.

[Frigyes06]

Can reproduce on Arch linux

[Rudxain]

I forgot to specify my system 😅:

• Debian Testing (12/13)
• GNOME 46 on Wayland

[AnonymousWP]

@Universal-Debloater-Alliance/developers Can we fix this so we can release 1.1.0?

[Rudxain]

I might attempt to fix it, but I have to read the Iced docs first

[AnonymousWP]

Removed this from the v1.1.0 release milestone as it's likely something we can't fix.

[lavafroth]

The theme will change if you restart the program. Sadly, this is more of an iced-rs issue.