wDetails view update, wVisit val, wSearch filter

* lblTitle wVisits is a button opening wDetails
* wDetails has two functionality - Create & Update. wDetails_OnActivated
checks for Patient property and changes UI. no change in
create/updatebutton_OnClick as it makes use of Patient property which is
altered above. - fascinating: turned out to be simple here.
* notnull fields in wVisits goes red on validation
* implemented search filter by contains on list items but not the db.
search filter focus on start.