Fixed tooltip size to 10px

Author: mmrtnz

src/less/components/tooltip.less

@@ -2,7 +2,7 @@
   position: absolute;
 
   font-family: 'Roboto';  
-  font-size: 12px;
+  font-size: 10px;
   line-height: 22px;
   padding: 0 8px;
   color: @white;