docs/website: adjust presentation of Mind sponsoring

Make the font size of the Mind block the same as all other blocks (it
was smaller) and re-adjust the min height of all blocks so that they
look the same.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

docs/website/css/main.css

@@ -163,7 +163,7 @@ i {
 }
 
 .panel-sponsor {
-	min-height: 300px;
+	min-height: 350px;
 	text-align: justify;
 	text-justify: inter-word;
 }

docs/website/sponsors.html

@@ -44,7 +44,7 @@
 		  <img class="img-responsive center-block" src="images/mind-logo.png"/>
 		</a>
 	      </div>
-	      <div class="col-sm-12" style="font-size: 12px;">
+	      <div class="col-sm-12">
 		<a href="http://www.mind.be">Mind</a> sponsored the
 		dinner of the FOSDEM 2014, 2015 and 2016 Developers
 		Meeting (Brussels), the meeting room and the dinner