The `grid-template-areas` were not correct on the messages page
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Co-authored-by: Joffrey JAFFEUX <j.jaffeux@gmail.com>
Co-authored-by: Martin Brennan <martin@discourse.org>
When Horizon is not the default theme, and the color palette
switcher is used, we were ending up in a broken CSS state because
the color definitions were not loaded correctly when calling
`/color-scheme-stylesheet/` to get the new stylesheet URLs.
The problem was that we were not giving the theme ID to this URL,
we were only doing `/color-scheme-stylesheet/:palette_id`, not
`/color-scheme-stylesheet/:palette_id/:theme_id`, so the theme
color definitions like the ones that define the background color
were not loaded.
This commit fixes the issue and also changes to recreating the
`<link>` tags for the CSS in the head so we can check if they
are loaded correctly for easier testing in system specs.
This PR is the beginning of converting the color picker to use built in
core color palettes.
The `color_schemes` defined in `about.json` are created in core when the
theme is imported,
and we then show all user-selectable color palettes in this sidebar
footer menu.
An important caveat here is that all of the Horizon themes must be
changed to `user_selectable`
otherwise they will not show up in the color palette selector in the
sidebar.
When choosing a color palette that also has a corresponding dark color
palette,
*both* light mode and dark mode are correctly saved with the color
palette(s) chosen,
using the color palette cookie we already have in core.
Anon users can also set a palette, which will be saved in a cookie.
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Co-authored-by: Sérgio Saquetim <saquetim@discourse.org>
Co-authored-by: Martin Brennan <martin@discourse.org>
Co-authored-by: Osama Sayegh <asooomaasoooma90@gmail.com>
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