Merge remote-tracking branch 'origin/master' into prod

* origin/master:
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@@ -84,6 +84,7 @@ then
 	if (( ! show_graphs ))
 	then
 		cat <<-EOHTML
+			<div style="position:fixed; background:white">
 			<table style="width:$(( graph_width + 97 ))px; text-align:center; border:1px solid black; border-collapse:collapse">
 				<tr>
 					<td style="background:black; color:white">Overview</td>
@@ -105,6 +106,8 @@ then
 					<td style="border:1px solid black"><a href="add.html?start=$start&amp;end=$end"><b>Add data</b></a></td>
 				</tr>
 			</table>
+			</div>
+			<div style="position:absolute; top:3em">
 		EOHTML
 		readarray -t lastupdatelines < <(
 			rrdtool lastupdate $rrdfile
@@ -390,6 +393,7 @@ then
 		EOHTML
 	else
 		cat <<-EOHTML
+			<div style="position:fixed; z-index:100; background:white">
 			<table style="width:$(( graph_width + 97 ))px; text-align:center; border:1px solid black; border-collapse:collapse">
 				<tr>
 					<td><a href="?start=$start&amp;end=$end">Overview</a></td>
@@ -443,6 +447,8 @@ then
 							</td>
 						</tr>
 					</table>
+			</div>
+			<div style="position:absolute; top:4.5em">
 		EOHTML
 
 		if (( show_all ))
@@ -522,12 +528,13 @@ then
 						</td>
 						<td style="text-align:right">
 							<a href="http://www.fsf.org/licensing/licenses/agpl-3.0.html">
-								<img src="/AGPL.png" height="31" width="88" />
+								<img src="/AGPL.png" alt="AGPLv3" height="31" width="88" />
 							</a>
 						</td>
 					</tr>
 				</table>
 			</div>
+			</div>
 		</body></html>
 	EOHTML
 else