minor style fixes

static/css/style.less

@@ -291,9 +291,10 @@ nav li:before {
         align-items: center;
         flex-direction: row;
         flex-wrap: wrap;
-        justify-content: space-around;
+        justify-content: center;
         margin-right: 0.3rem;
 
+        
       
     }
 
@@ -529,6 +530,7 @@ button.icon {
         min-width:1.8rem;
         text-align: center;
         font-size: 1.2rem;
+        margin:0.2rem;
     }
 
 }