various small fixes

src/assets/css/main.css

@@ -263,7 +263,7 @@ button:focus,
   grid-gap: 15px;
 }
 .user-item {
-  background: rgba(255, 255, 255, 0.1);
+  background: #383c3f;
   transition: 0.2s ease-in-out transform, 0.2s ease-in-out box-shadow;
   overflow: hidden;
   border-radius: 6px;

src/assets/css/main.less

@@ -294,7 +294,7 @@ button, .button {
     }
 }
 .user-item {
-    background: rgba(255,255,255,0.1);
+    background: #383c3f;
     transition: 0.2s ease-in-out transform, 0.2s ease-in-out box-shadow;
     overflow: hidden;
     border-radius: 6px;

src/assets/css/userdetail.css

@@ -17,7 +17,7 @@
   height: 200px;
   align-self: center;
   background: #eee;
-  border-radius: 6px;
+  border-radius: 50%;
   background-size: cover;
 }
 .section-user-detail .user-detail-background .user-detail-dim .user-detail .user-meta-data .user-name {

src/assets/css/userdetail.less

@@ -18,7 +18,7 @@
                     height: 200px;
                     align-self: center;
                     background: #eee;
-                    border-radius: 6px;
+                    border-radius: 50%;
                     background-size: cover;
                 }
                 & .user-meta-data {