Merge with latest upstream

.config/ags/scss/_session.scss

@@ -1,24 +1,23 @@
 .session-bg {
-    background-color: $t_surface;
+    background-color: transparentize($color: $layer0, $amount: 0.4);
 }
 
 .session-button {
     @include large-rounding;
     min-width: 8.182rem;
     min-height: 8.182rem;
-    background-color: $surfaceVariant;
-    color: $onSurfaceVariant;
+    background-color: $layer1;
+    color: $onLayer1;
     font-size: 3rem;
 }
 
 .session-button-focused {
-    background-color: $secondaryContainer;
-    color: $onSecondaryContainer;
+    background-color: $layer1Hover;
 }
 
 .session-button-desc {
-    background-color: mix($surface, $surfaceVariant, 50%);
-    color: mix($onSurface, $onSurfaceVariant, 50%);
+    background-color: $layer2;
+    color: $onLayer2;
     border-bottom-left-radius: $rounding_large;
     border-bottom-right-radius: $rounding_large;
     padding: 0.205rem 0.341rem;
@@ -29,7 +28,13 @@
     @include large-rounding;
     min-width: 8.182rem;
     min-height: 5.455rem;
-    background-color: $surfaceVariant;
-    color: $onSurfaceVariant;
+    background-color: $layer1;
+    color: $onLayer1;
     font-size: 3rem;
 }
+
+@for $i from 1 through 7 {
+    .session-color-#{$i} {
+        color: nth($sessionColors, $i);
+    }
+}