casts should be alphabetical order (RM #1113)

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Issue migrated from Redmine: https://redmine.postgresql.org/issues/1113
Originally created by Karen Blatchley at 2016-05-17 14:24:55 UTC.

whenever user add new/create new casts it should be placed order wise; and should be consistent with pgAdminIII

Created by Priyanka Shendge 2016-03-29

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Comment migrated from Redmine: https://redmine.postgresql.org/issues/1113#note-1
Originally created by Sanket Mehta at 2016-05-27 13:27:43 UTC.

Redmine ticket header update:

Name	Old Value	New Value
Status changed	New	In Progress
Assigned To changed		Sanket Mehta

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Comment migrated from Redmine: https://redmine.postgresql.org/issues/1113#note-2
Originally created by Sanket Mehta at 2016-05-28 13:27:38 UTC.

Applied in changeset commit:2fb1e96e2fc5ef0b0667298c97c0ce8c74ebcf15.

Redmine ticket header update:

Name	Old Value	New Value
Status changed	In Progress	Resolved
Done Ratio changed	0	100

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Issue closed on Redmine.