Fix the favicon

client/components/main/layouts.jade

@@ -2,7 +2,7 @@ head
   title Wekan
   meta(name="viewport"
    content="maximum-scale=1.0,width=device-width,initial-scale=1.0,user-scalable=0")
-  link(rel="shortcut icon" href="/favicon.png")
+  link(rel="shortcut icon" href="/wekan-favicon.png")
 
 template(name="userFormsLayout")
   section.auth-layout