Added palettes for suitable themes

[stefonarch]

Related to #50 which could be integrated after.

[tsujan]

The installation path is correct.

There's only a small thing that needs a short story:

Ambiance was inspired by a an old GTK theme with the same name in Ubuntu. It doesn't exist anymore but was a light theme.

Kvantum has a light theme called "KvAmbiance" (different from "KvAmbience") which matches it exactly and was made for use under Unity. Since Gnome devs wanted a monopoly on GTK themes, they made theme making harder and harder. So, Ambiance became impossible after a while.

EDIT:

base_color=#ffffff, window_color=#f2f1f0, highlight_color=#f07746, etc.

[stefonarch]

So what do you mean with this? We shouldn't add a ambiance palette but we have an "ambiance" theme?

[tsujan]

No. I just mean Ambiance is a light theme, with the above-mentioned colors. It fits the dark Ambiance LXQt style (→ screenshots of old versions of Ubuntu).

[stefonarch]

Ok, thanks,got it now.
I just took menu (background)colors for window colors.
But as things evolve: we could have "ambiance bright" and "ambiance dark"?

[tsujan]

Ambiance had dark menus and light windows. It was a dark-and-light theme.

Qt palettes can't support dark-and-light themes but Qt styles can (as far as I know, only Kvantum does). This is how Ubuntu's Ambiance looked like:

[stefonarch]

We should finish this here. I was thinking - if doable - about an checkbox "Set also matching color scheme" in themes settings.
https://www.reddit.com/r/LXQt/comments/tb6u6o/dark_theme/

[tsujan]

That reddit page is about what the user calls "color profile". Either he has an outdated version of LXQt or he hasn't launched the config dialog — most probably, the first.

[tsujan]

There's a merge conflict. Would you fix it?

[tsujan]

If it has passed your tests and you don't have a plan to change it, please merge it. We could enhance it later if needed.

Hopefully, I'll remember what minor problem I saw in some Panel themes and fix it.

[stefonarch]

Tested on my other PC, some link colors could be improved.