[meta] Make project browser work with windows high contrast mode

hello @chrisfromredfin this looks fine. The borders are visible in solid white colour and the spinner too looks fine in dark mode. Checked this on version 2.0.x.
Added screenshots for reference.

Changing it to review state

I've checked the two pages in question as well. In regards of the settings in chrome and edge. i have ticked the "enable automatic dark mode" checkbox and the "Prefers contrast more" in addition to just "forced colors: active" which mimics the windows high contrast mode. In the following a list of issues on the browse and details page.

Browse Page

• Underline for the active browse tab has a too low color contrast (but that looks like a problem for claro in general?
• Underline for the active source type has a grey underline instead of darkish yellow, which is slightly higher contrast but still under 3:1
• strictly speaking the border of the search field and the select fields in the filter field set, with 2.9:1 with rgba(87, 87, 87, 1) against the black background is a slightly too small color contrast.
• the icons in the list and grid button are invisible
• the categories have a border that is none existent in the none high contrast mode
• the border of the add and install button has the same border color problem like the search field and select fields and a color contrast of 2.9:1
• the outline circle for the active page in the pager has a too low color contrast
• in the page first, previous, next and last icon is close to invisible
• the spinner when installing a module is also greyish with a probably too low color contrast. in regular mode the spinner is blue maybe in high contrast mode make it simply white?

*i will continue the list for the detail page. but while installing a second module i broke my install again. got the installer page issue another time. i will assign the issue to me for now until the write up is done.

We've agreed on slack to make this issue a meta issue and chop this issue up into smaller child issues.