Added a check to prevent warnings like #1225
Files extrafields fix #1229 by @cmsworksru
A check for module installed/active status. Fixes #1231
Fix #1232 by @cmsworksru
A fix for datetime extrafields import
Adds page identifier to canonical_uri in certain situations when not present
Fixes custom admin theme resource and lang overriding
Fixes #1253
Fixes #1247 and incorrect item count
Added cache data size check on `$cache->db->store()`, closed #1235
SFS fix #1236 by @Uch99
Fix #1239
A different implementation of theme resource overloading for #1240
Optimization for #1240 by @macik
Added indexExists and addIndex to database.php
Updates to compliment 1ea4d0734483e1e92533d5beacc0a6a3f31d54b6
Small update
Fix #1255

Warning on PDO::quote()
Addition fix for #1255

Data should be serialized to check length
Another way of resource overloading

See #1240