Mainz css file produces left aligned FamilyMap pages (#489)

* Mainz css file produces left aligned FamilyMap pages

Solving Mainz problem creates new ones with Basic-Blue
and Nebraska styles sheet.

Some cleanup with unused css file (GeoView.css)

Fixes #10268

* Many problems with css files and the ancestor tree

* media file not created if we have unused media.

data/css/Web_Basic-Ash.css

@@ -86,6 +86,12 @@ h1 {
     font-weight: bold;
     padding-left: 15px;
 }
+h2 {
+    display:block;
+    margin:0;
+    padding:0;
+    text-align: center;
+}
 h3 {
     font-size: large;
     padding-left: 15px;
@@ -415,7 +421,7 @@ div#SourceDetail {
 }
 .subsection {
     clear: both;
-    overflow: hidden;
+    overflow: visible;
 }
 .subsection p {
     margin: 0px;