Added some missing translations (#608)

tinyfilemanager.php

@@ -1780,8 +1780,8 @@ class="edit-file"><i class="fa fa-pencil-square-o"></i> <?php echo lng('Advanced
                 </div>
             </div>
             <div class="edit-file-actions col-xs-12 col-sm-7 col-lg-6 text-right pt-1">
-                <a title="Back" class="btn btn-sm btn-outline-primary" href="?p=<?php echo urlencode(trim(FM_PATH)) ?>&amp;view=<?php echo urlencode($file) ?>"><i class="fa fa-reply-all"></i> <?php echo lng('Back') ?></a>
-                <a title="Backup" class="btn btn-sm btn-outline-primary" href="javascript:void(0);" onclick="backup('<?php echo urlencode(trim(FM_PATH)) ?>','<?php echo urlencode($file) ?>')"><i class="fa fa-database"></i> <?php echo lng('BackUp') ?></a>
+                <a title="<?php echo lng('Back') ?>" class="btn btn-sm btn-outline-primary" href="?p=<?php echo urlencode(trim(FM_PATH)) ?>&amp;view=<?php echo urlencode($file) ?>"><i class="fa fa-reply-all"></i> <?php echo lng('Back') ?></a>
+                <a title="<?php echo lng('BackUp') ?>" class="btn btn-sm btn-outline-primary" href="javascript:void(0);" onclick="backup('<?php echo urlencode(trim(FM_PATH)) ?>','<?php echo urlencode($file) ?>')"><i class="fa fa-database"></i> <?php echo lng('BackUp') ?></a>
                 <?php if ($is_text) { ?>
                     <?php if ($isNormalEditor) { ?>
                         <a title="Advanced" class="btn btn-sm btn-outline-primary" href="?p=<?php echo urlencode(trim(FM_PATH)) ?>&amp;edit=<?php echo urlencode($file) ?>&amp;env=ace"><i class="fa fa-pencil-square-o"></i> <?php echo lng('AdvancedEditor') ?></a>