- Remove css margins of floating keypad

This reverts commit f90bcc5b
Target installation seems not to support this Verona Api version yet

- Rewrite interface 'VopMetaData'
- Add parameter 'metadata' to VopReadyNotification

- Replace type 'any' with 'unknown'

- This corresponds to the representation in the keypad
- Prepares further adjustments to the keypad

- Name the control keys of the keyboard like those of the keypad

- Use the VeroSubscriptionService as a pure communication service
- Do not contaminate the VeroSubscriptionService with holding data

Level 2 is now the level with mild logging. Level 3 does not log 
anything apart from warnings and errors.

- A HotspotImage has an image and divs placed on it, which are used
as hotspots
- Inherits from FormElementComponent, which is why the hotspots are kept
  as a list in the value property.
- Can be validated as required and uses its own custom validator

 - Remove duplicate code in keypad templates
 - Extend the use of the configuration file

- delete french keypad

- problem with nullish values