Several minor bugfixes.

7.3.21
 - fix: SQLForm says Databaselink does not have enough privileges (perlDreamer Consulting, LLC)
    http://www.webgui.org/bugs/tracker/sqlform-says-databaselink-does-not-have-enough-privileges
 - fix: Self-deactivation doesn't show login screen after success
 - fix regression: Calendar events on the last day of the month do not appear on
 the month view
    http://www.webgui.org/bugs/tracker/fixed-calendar-events-on-the-last-day-of-the-month-do-not-appear-on-the-month-view
 - fix: List pending Transactions (perlDreamer Consulting, LLC)
    http://www.webgui.org/bugs/tracker/list-pending-transactions
 - fix: syndicated content fails if feeds have items with single and multiple category entries