More accurate warning text

If a case type is deleted, linked case.case_type_id data will be set to
null, rather than cascade deleted.  Update the warning to reflect this.
Web Test Fixes
WebTestFix
WebTestFix Further Changes
WebtestFix Further Enhancements
Merge pull request #3170 from jitendrapurohit/WebFix

Web Test Fixes
WebTestFix Improvements
Merge pull request #3171 from atif-shaikh/WebTextFix

Web text fix
Merge pull request #3180 from NileemaJadhav/CRM-master

Fix for 'Case dashboard' and 'Find case' page break
Merge pull request #3167 from adamwight/CRM-14473-warning

More accurate warning text
--Fix for "New Case" page break