Change opacity on hover (#621)

* Change opacity on hover

* Modify Tutorial

src/css/ingame_hud/building_placer.scss

@@ -18,6 +18,15 @@
         background-color: #55585a;
     }
 
+    pointer-events: all;
+
+    &:hover {
+        opacity: 10%;
+        .buildingImage {
+            opacity: 0%;
+        }
+    }
+
     .buildingLabel {
         @include PlainText;
         @include S(margin-bottom, 2px);

src/css/ingame_hud/interactive_tutorial.scss

@@ -29,6 +29,15 @@
         }
     }
 
+    pointer-events: all;
+
+    &:hover {
+        opacity: 10%;
+        .helperGif {
+            opacity: 0%;
+        }
+    }
+
     .title {
         color: #fff;
         opacity: 0.5;