In a future version we should move all classes to namespace, but for now
 only moving Attribute class to avoid problems with PHP>=8 which have its
 own Attribute class.

issue #6167

Object might not be finished when the error happens, take extra precautions

issue #6144

This will improve webservice error context.

issue #6071

Remove trailing ">"

issue #6051

When errors get converted to strings in CSV import error dialog, it
 outputs the trace which is way too much text. Errors should convert to
 their error message, to look the same as before we used error objects.

issue #6071

This helps knowing exactly where the first error happenened.

issue #6071

issue #6071

issue #6071

<p> cannot contain <pre> so we cannot use <pre> in hook error content.

issue #6071

issue #6071

issue #6071

issue #6071

issue #6071

Use a thrown error instead of calling msg_dialog and exit.
And use an exception handler to format uncaught fatal errors.

issue #6071

issue #6071

issue #6071

issue #6071

issue #6071

issue #6071

1.4 release is supposed to support PHP 7.0.

issue #6071

issue #6071

issue #6071

POC for html escaping of translated errors.

issue #6071

issue #6071

Adds FusionDirectoryError base class and one child class for check
 failures.
Use this new class for IntAttribute as first test.
Build HTML dialog from error class using attribute data.

issue #6071