Two features: page menu and custom filters

Add all reports dynamically into the page menu. The layout xml will unset the original page menu block and adds the clean page menu block. If you find any other possibility for injecting dynamic menu items let me know asap :-) You have to clear the cache if you change the title or add/remove a new report.

Second feature adds the possibility for custom filters for columns in the Report/View/Grid.php file.

Auto reformatting also removed some superfluous whitespaces / tabs ;-)
Done! See commit https://github.com/Zookal/custom-reports/commit/89ba487b6c69e62675f8283df9fb0ec61af4805d

JavaScript would be also fine ... but implementation on PHP was faster 8-)