Unset buttons does not include color inherit (#31801)

Fixed button color to inherit in following scenarios:
 * RoomList now rooms follow room text compound color
 * PinnedMessageBanner follow room text compound color
 * RoomHeader follow room text compound color

Signed-off-by: Örnfeldt Philip (66140321) <philip.ornfeldt@forsakringskassan.se>

res/css/views/rooms/RoomListPanel/_RoomListItemView.pcss

@@ -16,6 +16,7 @@
  */
 .mx_RoomListItemView {
     /* Remove button default style */
+    color: inherit;
     background: unset;
     border: none;
     padding: 0;

res/css/views/rooms/_PinnedMessageBanner.pcss

@@ -22,6 +22,7 @@
     box-shadow: 0 var(--cpd-space-2x) var(--cpd-space-6x) calc(var(--cpd-space-2x) * -1) rgb(27, 29, 34, 0.1);
 
     .mx_PinnedMessageBanner_main {
+        color: inherit;
         background: transparent;
         border: none;
         text-align: start;

res/css/views/rooms/_RoomHeader.pcss

@@ -21,6 +21,7 @@ Please see LICENSE files in the repository root for full details.
 
 .mx_RoomHeader_infoWrapper {
     /* unset button styles */
+    color: inherit;
     background: unset;
     border: unset;
     flex: 1;