Replace custom SVG with icon.

static/galene.css

@@ -1101,19 +1101,6 @@ legend {
 
 /*  Sidebar left */
 
-.svg-inline--fa {
-    display: inline-block;
-    font-size: inherit;
-    height: 1.2em;
-    overflow: visible;
-    vertical-align: -.125em;
-    color: #dbd9d9;
-}
-
-.svg-inline--fa:hover {
-    color: #c2a4e0;
-}
-
 #left-sidebar {
     min-width: 200px;
     max-width: 200px;
@@ -1130,11 +1117,16 @@ header .collapse {
     float: left;
     text-align: center;
     cursor: pointer;
-    padding-top: 5px;
+    font-size: 20px;
+    color: #dbd9d9;
     margin-right: 20px;
     margin-left: 5px;
 }
 
+header .collapse:hover {
+    color: #c2a4e0;
+}
+
 .galene-header {
     font-size: 1.3rem;
     font-weight: 900;

static/galene.html

@@ -30,9 +30,7 @@
             <nav class="topnav navbar navbar-expand navbar-light fixed-top">
               <div id="header">
                 <div class="collapse" title="Collapse left panel" id="sidebarCollapse">
-                  <svg class="svg-inline--fa" aria-hidden="true" data-icon="align-left" role="img" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512">
-                    <path fill="currentColor" d="M288 44v40c0 8.837-7.163 16-16 16H16c-8.837 0-16-7.163-16-16V44c0-8.837 7.163-16 16-16h256c8.837 0 16 7.163 16 16zM0 172v40c0 8.837 7.163 16 16 16h416c8.837 0 16-7.163 16-16v-40c0-8.837-7.163-16-16-16H16c-8.837 0-16 7.163-16 16zm16 312h416c8.837 0 16-7.163 16-16v-40c0-8.837-7.163-16-16-16H16c-8.837 0-16 7.163-16 16v40c0 8.837 7.163 16 16 16zm256-200H16c-8.837 0-16 7.163-16 16v40c0 8.837 7.163 16 16 16h256c8.837 0 16-7.163 16-16v-40c0-8.837-7.163-16-16-16z"></path>
-                  </svg>
+                  <i class="fas fa-align-left" aria-hidden="true"></i>
                 </div>
                 <h1 id="title" class="header-title">Galène</h1>
               </div>