Back buttons acualy go back to previous page instad of a static page

Unnecessary Enters removed

backend/edit-system.php

@@ -197,10 +197,6 @@ $lines = explode("\n", $trimmedString);
     <link type="text/css" rel="stylesheet" href="../assets/icons/fuse-icon-font/style.css">
     <!-- Animate.css -->
     <link type="text/css" rel="stylesheet" href="../assets/node_modules/animate.css/animate.min.css">
-
-
-
-
     <!-- Perfect Scrollbar -->
     <link type="text/css" rel="stylesheet" href="../assets/node_modules/perfect-scrollbar/css/perfect-scrollbar.css" />
     <!-- Fuse Html -->
@@ -210,7 +206,6 @@ $lines = explode("\n", $trimmedString);
 	<!-- Custom CSS -->
 	<link type="text/css" rel="stylesheet" href="../assets/css/custom.css">
     <!-- / STYLESHEETS -->
-    
     <!-- JAVASCRIPT -->
     <!-- jQuery -->
     <script type="text/javascript" src="../assets/node_modules/jquery/dist/jquery.min.js"></script>
@@ -330,7 +325,7 @@ $lines = explode("\n", $trimmedString);
 						 
 						  <!-- CONTENT -->
       <div class="clearfix" style="background:white; padding:20px;">
-       <a href="systems.php" class="btn btn-secondary btn-fab pull-left"><i class="icon-arrow-left"></i></a>
+       <button class="headbnt btn btn-secondary btn-fab pull-left icon icon-arrow-left" onclick="window.history.back();"></button>
        <h2 class="pull-right">system ID: <?php echo $sysID; ?></h2>
       </div>
      <div class="form-wrapper md-elevation-8 p-4">