[DataManager] Add validation for input fields

[PhilVanB]

Adds a validation for all input fields with the following regex: ^[a-zA-Z0-9_\-\s]*$

Can be overwritten selectively by adding a pattern to the digitizer's yaml configuration:

-
   type: input
   title: E-Mail
   name: email
   css: { width: 40% }
   pattern: '^[a-zA-Z0-9_\-\s@]*$'