port 1.7.7 bug fixes to trunk (Trac #2956)

[elgg-gitbot]

Original ticket http://trac.elgg.org/ticket/2956 on 41136820-05-30 by cash, assigned to unknown.

Elgg version: Github Master

[elgg-gitbot]

brettp wrote on 41140929-11-14

(In [svn:8360]) Refs #2765, #2956. Merged [svn:7830] fix for group files to trunk.

[elgg-gitbot]

brettp wrote on 41140987-11-23

(In [svn:8361]) Refs #2617, #2956: Merged email notification exception message fix in [svn:7926] to trunk.

[elgg-gitbot]

brettp wrote on 41141107-05-13

(In [svn:8362]) Refs #2813, #2956. Ported get_config() returns null to 1.8's get_config() and elgg_get_config().

[elgg-gitbot]

brettp wrote on 41141145-07-07

(In [svn:8363]) Refs #2793, #2956. Ported run_function_once() and datalist_get/set() changes for values > 32 chars to trunk.

[elgg-gitbot]

brettp wrote on 41141175-10-23

(In [svn:8364]) Refs #2749, #2956. Merged elgg_depracated_notice() fixes to trunk.

[elgg-gitbot]

brettp wrote on 41141206-01-14

(In [svn:8365]) Refs #2956. Merged left out merges from [svn:2799] to trunk.

[elgg-gitbot]

brettp wrote on 41141216-01-31

(In [svn:8366]) Refs #2833, #2956. Merged 1.7's action timeout changes to 1.8.

[elgg-gitbot]

brettp wrote on 41141238-04-30

(In [svn:8367]) Refs #2697, #2956. Ported fix to show users and groups in river filter to trunk.

[elgg-gitbot]

brettp wrote on 41141247-08-24

(In [svn:8368]) Refs #2787, #2956: Merged fix for deleting group icon files on group delete to trunk.

[elgg-gitbot]

brettp wrote on 41141252-03-05

Got the relevant ones and reopened tickets for any that need discussed or different implementations than in 1.7.