Bug fixes and minor updates

- Removed echo from Support Debug dumpVar call
- deprecated DB\IO toggle dbDebug and changed set/get to be like normal
  ones where set just sets and doesn't return anything
- Renamed the logJsDebug to loggingLevelIsDebug
  (other levels can be checked with ->getLoggingLevel()->includes(Level::...))

Adjusted tests for all changes

www/includes/admin_header.php

@@ -121,6 +121,6 @@ if (!$login->loginActionRun()) {
 //------------------------------ logging end
 
 // pass on DEBUG flag to JS via smarty variable
-$smarty->DATA['JS_DEBUG'] = $log->getJsDebug();
+$smarty->DATA['JS_DEBUG'] = $log->loggingLevelIsDebug();
 
 // __END__