change position of return (#1374)

public/js/main.js

@@ -6,14 +6,17 @@
 function switchThemes() {
   var themeName = document.getElementById("theme-selector").value
   var head = document.getElementsByTagName("head")[0]
+  
+  if (themeName === "") {
+    return
+  }
+  
   // Remove the theme in place, it fails if one isn't set
   try {
     head.removeChild(document.getElementById("theme"))
   } catch (err) {}
   // Don't add a node if we don't want extra styling
-  if (themeName === "") {
-    return
-  }
+	
   // Create the new one and put it back
   var newTheme = document.createElement("link")
   newTheme.setAttribute("rel", "stylesheet")