Render h4 headings a bit smaller and in black

Issue-Ref: 4006
Issue-Url: https://af3-developer.fortiss.org/issues/4006



Signed-off-by: Simon Barner <barner@fortiss.org>

org.fortiss.af3.rcp.help/html/layout/stylesheet.css

@@ -151,8 +151,8 @@ h3 {
   margin: 0 0 15px 0; }
 
 h4 {
-  color: #ffcd00;
-  font-size: 1.2rem;
+  color: #192846;
+  font-size: 1.1rem;
   font-weight: 500;
   line-height: 120%;
   margin: 0 0 10px 0; }
@@ -265,7 +265,8 @@ h4 {
   font-size: 18px;
   border: none;
   outline: none;
-  background-color: #004ea8;
+  background-color: #004696;
+  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
   color: white;
   cursor: pointer;
   padding: 15px;