Features:
* External API > When getting skills for a user, the new field NumberOfDaysWorkExperience is included in the response.
* App > Reports > Competences > Skills > A new column showing the average work experience per skill row is added.
* App > Reports > Competences > Skills > One specific skill > A new column showing the work experience per person row is added.
Fixes:
* App > Administration > Users > Unchecking all the access roles for a user behaves as giving the user only the restricted role.
* App > Customers > Working with only customers without even having the Assignments module is possible
* App > Profile > Deleting skills from a work experience, or deleting the whole work experience itself, will properly recalculate the experience length for said skill
* App > Tags > Tags are not only addable, but removable as well in the edit tags modal per entity
* App > Sharing requests via email will work no matter what icons you clicked to open the share modal