Hide scrollbars on screenshot (show then on hover)

front/src/css/main.css

@@ -192,8 +192,11 @@ a.linkButton {
   background: #000;
 }
 .screenshotWrapper > div {
-  overflow: scroll;
   position: relative;
+  overflow: hidden;
+}
+.screenshotWrapper > div:hover {
+  overflow: auto;
 }
 .screenshotWrapper .screenshotImage {
   width: 100%;

front/src/less/main.less

@@ -132,8 +132,12 @@ a.linkButton {
     background: #000;
 
     > div {
-        overflow: scroll;
         position: relative;
+        overflow: hidden;
+
+        &:hover {
+            overflow: auto;
+        }
     }
 
     .screenshotImage {