Move legacy JApplication test, cleaning up other application tests, add stub for app close
Moving some test classes to legacy to match file structure, fix missing import
Create a separate JLanguage instance for JHelpTest
Set fixed precision value to avoid round related issues
Added rounding fix to the generatecss task too
Improving Tests for archive Package

used more specific asserts
reordered code
simplified test code
Fix expectation in JToolbarButtonHelpTest that it was being translated
Disable menu when editing a message, fix #4788
Remove doubled full stop in system/error.php