remove delete buttons and other actions if contact is not readable

[myrho]

Removes delete buttons, datepicker and other actions on properties if the contact is not readable

[codecov]

Codecov Report

Merging #1413 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1413   +/-   ##
=======================================
  Coverage   62.31%   62.31%           
=======================================
  Files           4        4           
  Lines          69       69           
=======================================
  Hits           43       43           
  Misses         26       26

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[welcome]

Thanks for your first pull request and welcome to the community! Feel free to keep them coming! If you are looking for issues to tackle then have a look at this selection: https://github.com/nextcloud/contacts/issues?q=is%3Aopen+is%3Aissue+label%3A%22good+first+issue%22
Most developers hang out on IRC. So join #nextcloud-contacts and #nextcloud-dev on Freenode for a chat!