Improvements to the quality of artworks and user images - Part 2 (#512)

* Improved the overall appearance of user images

* Rounded photo in 'My profile' page

* Improved quality of media artwork

* fix some minor bugs introduced from a merge conflict

src/scripts/librarymenu.js

@@ -80,7 +80,7 @@ define(["dom", "layoutManager", "inputManager", "connectionManager", "events", "
     function updateHeaderUserButton(src) {
         if (src) {
             headerUserButton.classList.add("headerUserButtonRound");
-            headerUserButton.innerHTML = '<img src="' + src + '" />';
+            headerUserButton.innerHTML = '<div class="headerButton headerButtonRight paper-icon-button-light headerUserButtonRound" style="background-image:url(\'' + src + "');\"></div>";
         } else {
             headerUserButton.classList.remove("headerUserButtonRound");
             headerUserButton.innerHTML = '<i class="md-icon">&#xE7FD;</i>';