Fix project selector doesn't submit the form on change (where it should)
Fix extra fields textfield values can not be saved
Fix extra fields "general failure" (Ref #69)
Fix extra fields "general failure" admin part (Ref #69)
Merge remote-tracking branch 'origin/master'

Conflicts:
	components/com_tracker/view/add/html.php
	components/com_tracker/view/edit/html.php
	components/com_tracker/view/edit/tmpl/fields.php