Make the source content expand when the sidebade is collapsed

Author: GuillaumeGomez

templates/style/style.scss

@@ -453,6 +453,7 @@ div.package-sheet-container {
 }
 
 $sidebar-side-padding: 10px;
+$collapsed-side-menu-width: 46px;
 
 div.package-page-container {
     padding-bottom: 50px;
@@ -889,7 +890,7 @@ ul.pure-menu-list {
     }
 
     #side-menu.collapsed {
-        max-width: 46px;
+        max-width: $collapsed-side-menu-width;
 
         ul {
             li:not(.toggle-source), .text {
@@ -907,6 +908,10 @@ ul.pure-menu-list {
         }
     }
 
+    #side-menu.collapsed + #source-code-container {
+        width: calc(100% - #{$collapsed-side-menu-width});
+    }
+
     #source-warning {
         height: 100%;
     }