diffHighlighter: Fix indent-after-stagebutton bug

- display context lines in own <div>.
- Stagebutton no longer is float: left.

This fixes ticket #104

Signed-off-by: Johannes Gilger <heipei@hackvalue.de>

html/views/commit/commit.css

@@ -61,7 +61,6 @@ table.diff {
 }
 
 .diff a.stagebutton {
-	display: block;
 	width: 40px;
 	padding: 0 2px 0 2px;
 	margin-bottom: 4px;
@@ -77,7 +76,6 @@ table.diff {
 	text-align: center;
 
 	-webkit-border-radius: 2px;
-	float: left;
 }
 
 #multiselect {
@@ -94,4 +92,4 @@ table.diff {
 	border: 5px solid #EEE;
 	margin: -5px;
 	padding-left: 20px;
-}
+}