Merge of "in-portal/branches/5.2.x@16513" to "in-portal/branches/5.3.x@16503".
Fixes INP-1481 - Add missing "svn:keywords" properties to PHP files (5.3.x)
Fixes INP-1208 - Increase width of "Headers" column in "Email Queue" grid
Fixes INP-1223 - Asynchronous e-mail sending by default
Fixes #0001399: Remove "ItemSQLs" from unit configs
Releasing version 'branches/5.3.x' (copy from 'branches/5.2.x') of 'in-portal' module.
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