Minor css improvements

src/css/ingame_hud/buildings_toolbar.scss

@@ -12,7 +12,8 @@
     transition: transform 120ms ease-in-out;
     will-change: transform;
 
-    background-color: rgba(mix(#ddd, $colorBlueBright, 90%), 0.75);
+    background-color: rgba(mix(#ddd, $colorBlueBright, 90%), 0.5);
+    backdrop-filter: blur(D(3px));
 
     @include DarkThemeOverride {
         background-color: #222428;

src/css/ingame_hud/keybindings_overlay.scss

@@ -7,10 +7,7 @@
     flex-direction: column;
     align-items: flex-start;
     color: #333438;
-    // text-shadow: #{D(1px)} #{D(1px)} 0 rgba(0, 10, 20, 0.1);
-    backdrop-filter: blur(D(3px));
-    border: D(1px) solid #d2d2d2;
-    border-radius: D(6px);
+    backdrop-filter: blur(D(2px));
     padding: D(3px);
 
     @include DarkThemeOverride {