Collapse by default the dependency graphs

Hide by default the dot graphs that show the dependencies of the class
at the beginning of the page.

Author: Andreas Paschos

src/doxyfile

@@ -1190,7 +1190,7 @@ HTML_TIMESTAMP         = NO
 # The default value is: NO.
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-HTML_DYNAMIC_SECTIONS  = NO
+HTML_DYNAMIC_SECTIONS  = YES
 
 # With HTML_INDEX_NUM_ENTRIES one can control the preferred number of entries
 # shown in the various tree structured indices initially; the user can expand