Feature: #20194 - Configuration for displaying the "Save & View" button

See forge#20194


The "Save & View" button is configurable by TSConfig "TCEMAIN.preview.disableButtonForDokType" (CSV of "doktype" IDs) to disable the button for custom page "doktypes". The default value is set in the PHP implementation: "254, 255, 199" (Storage Folder, Recycler and Menu Seperator)


The "Save & View" button is no longer displayed in folders and recycler pages.