Added Additional Delete Link in File Viewer View (#1141)

* Added Additional Delete Link in File Viewer View

I found myself clicking into specific files to see them larger, then wanting to delete them, only to find I had to go back to another screen to delete them.

* Changed Reference to Invalid Variable

tinyfilemanager.php

@@ -1835,6 +1835,9 @@ function getSelected($l) {
                     <input type="hidden" name="token" value="<?php echo $_SESSION['token']; ?>">
                     <button type="submit" class="btn btn-link text-decoration-none fw-bold p-0"><i class="fa fa-cloud-download"></i> <?php echo lng('Download') ?></button> &nbsp;
                 </form>
+                <?php if (!FM_READONLY): ?>
+                <b class="ms-2"><a title="<?php echo lng('Delete') ?>" href="?p=<?php echo urlencode(FM_PATH) ?>&amp;del=<?php echo urlencode($file) ?>" onclick="confirmDailog(event, 1209, '<?php echo lng('Delete').' '.lng('File'); ?>','<?php echo urlencode($file); ?>', this.href);"> <i class="fa fa-trash-o"></i> Delete</a></b>
+                <?php endif; ?>
                 <b class="ms-2"><a href="<?php echo fm_enc($file_url) ?>" target="_blank"><i class="fa fa-external-link-square"></i> <?php echo lng('Open') ?></a></b>
                 <?php
                 // ZIP actions