if the uploaded file is an image mime type, display it

tpl/bootstrap-compact.html

@@ -158,6 +158,7 @@
 		</header>
 		<section class="container">
 			<article class="row">
+				<div id="image" class="col-md-12 text-center hidden"></div>
 				<div id="prettymessage" class="col-md-12 hidden">
 					<pre id="prettyprint" class="col-md-12 prettyprint linenums:1"></pre>
 				</div>

tpl/bootstrap.html

@@ -156,6 +156,7 @@
 		</header>
 		<section class="container">
 			<article class="row">
+				<div id="image" class="col-md-12 text-center hidden"></div>
 				<div id="prettymessage" class="col-md-12 hidden">
 					<pre id="prettyprint" class="col-md-12 prettyprint linenums:1"></pre>
 				</div>

tpl/page.html

@@ -81,6 +81,7 @@
 					<span id="filewrap">{function="t('Attach a file:')"} <input type="file" id="file" name="file" /></span>
 					<button id="fileremovebutton">{function="t('Remove attachment')"}</button>
 				</div>{/if}
+				<div id="image" class="hidden"></div>
 				<div id="prettymessage" class="hidden">
 					<pre id="prettyprint" class="prettyprint linenums:1"></pre>
 				</div>