Background and foreground colors for hovered wysiwig/trumbowyg editor buttons are almost indistinguishable

[rwawr]

Describe the bug

In dark mode, the foreground color of the wysiwig/trumbowyg editor buttons is almost indistinguishable from the background color when hovered or focused. This does not appear to affect 1.7.2, but I believe it does affect 1.8.0 and up.

To Reproduce

Steps to reproduce the behavior:

1. Cook a new Orchard Core 1.8.2 site using the "Agency" recipe
2. In the admin panel, go to Content > Content Definition > Content Types, and Edit the Html widget type
3. Edit the "Content" HtmlField field and select "Trumbowyg editor" or "Wysiwig editor" for "What type of editor should be used?"
4. On the Design > Widgets page, add an Html Widget
5. Set the admin theme to dark mode and notice that hovering over any of the buttons in the trumbowyg/wysiwig editor makes the background white but does not adjust the foreground color to stand out against the white background.

Expected Behavior

Editor buttons should have a foreground color that stands out from background when focused/hovered.

[hishamco]

@rwawr did you try it in the latest bits?

[rwawr]

@hishamco Yes, I just synced my fork and tried again, and the issue is still occurring for me.

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