[Glitch] Fix edit history dropdown and modal in light theme

Port 64d2988d18 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/styles/mastodon-light/diff.scss

@@ -116,7 +116,8 @@
 }
 
 .dropdown-menu__item {
-  a {
+  a,
+  button {
     background: $ui-base-color;
     color: $ui-secondary-color;
   }
@@ -172,7 +173,15 @@
   }
 }
 
-.dropdown-menu__separator {
+.dropdown-menu__separator,
+.dropdown-menu__item.edited-timestamp__history__item,
+.dropdown-menu__container__header,
+.compare-history-modal .report-modal__target,
+.report-dialog-modal .poll__option.dialog-option {
+  border-bottom-color: lighten($ui-base-color, 12%);
+}
+
+.report-dialog-modal__container {
   border-bottom-color: lighten($ui-base-color, 12%);
 }
 
@@ -233,6 +242,7 @@
 .embed-modal,
 .error-modal,
 .onboarding-modal,
+.compare-history-modal,
 .report-modal__comment .setting-text__wrapper,
 .report-modal__comment .setting-text,
 .report-dialog-modal__textarea {