Small fixes and ad rotation

res/template/file_not_found.html

@@ -25,7 +25,7 @@
 					file to be temporarily unavailable
 				</li>
 				<li>
-					File file has been lost due to a problem with the storage
+					The file has been lost due to a problem with the storage
 					system
 				</li>
 			</ul>

res/template/home.html

@@ -156,13 +156,18 @@
 				</div>
 				<div>
 					<div class="feat_label">
-						<a href="javascript:void(0);" onclick="return explainFileExpiry();">File expiry</a>
+						File expiry
 					</div>
 					<div class="feat_normal">
 						30 days after the last time it is viewed
 					</div>
 					<div class="feat_pro">
 						<span class="text_highlight">90 days</span> after the last time it is viewed
+						<br/>
+						<button class="round" onclick="return explainFileExpiry()">
+							<i class="icon">info</i>
+							More information
+						</button>
 					</div>
 				</div>
 				<div>
@@ -192,9 +197,7 @@
 				</div>
 				<div>
 					<div class="feat_label">
-						<a href="javascript:void(0);" onclick="return explainDirectLinking();">
-							Hotlinking
-						</a>
+						Hotlinking
 					</div>
 					<div class="feat_normal">
 						Rate limiting mode will be enabled when a file has 3