Squashed commit of the following:

commit 84857f164b47a24b115f3e8d1d4cde1a294ee3ee
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Tue Jun 11 10:09:04 2013 +0200

    Exchanged tree icon and made TreeView configurable for CustomerTicketSearch.

commit 134d66aad66432e99fec17e1af8a2086584eed78
Merge: c3a007c 97e407a
Author: Carlos Rodriguez <carlos.rodriguez@otrs.com>
Date:   Mon Jun 10 10:04:18 2013 -0500

    Merge branch 'master' into feature-otrsmultiserviceselect-mab-master

commit c3a007c051e7042dcc8960a3b428385aa5117e00
Merge: 8503720 9acf897
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Mon Jun 10 16:26:02 2013 +0200

    Merge branch 'master' into feature-otrsmultiserviceselect-mab-master

commit 85037203ac869ec571929fb37b0a0cb8a1f4783f
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Mon Jun 10 15:26:50 2013 +0200

    Fixed multiple recognition.

commit d234996ea8b92854dc0c578ff62e7beb237f86d5
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Fri Jun 7 09:23:41 2013 +0200

    Added tree icon for CI.

commit 9e880f530bd53f769b42bf7e95d710c858eaf9fc
Merge: 938fc30 694c883
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Fri Jun 7 08:54:44 2013 +0200

    Merge branch 'master' into feature-otrsmultiserviceselect-mab-master

commit 938fc305a8f61653a0400ae6175809203c440ab3
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Fri Jun 7 08:54:37 2013 +0200

    Enabled JSTree tree selection for CustomerTicketMessage and CustomerTicketSearch.

commit dfb3454dcd85456b09e5a1062e7b3f38f6125daa
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Fri Jun 7 08:16:08 2013 +0200

    Started implementing the tree selection in the customer interface.

commit f2973ee92951e0f88aaf960542dc4126dd39f23d
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Thu Jun 6 14:10:39 2013 +0200

    Code improvements.

commit 0f621d2b5a60d53152695dc79a03e856a6e6e692
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Thu Jun 6 13:43:46 2013 +0200

    Code cleanup.

commit 0a941f48408f06112bf0b542b2fda5f13dce09c3
Author: Martin Gruner <martin.gruner@otrs.com>
Date:   Thu Jun 6 13:31:10 2013 +0200

    Small code optimization: avoid one $.each.

commit 22a21d5fe308671bc32e93ce1915b99bfe9f5d77
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Thu Jun 6 12:23:19 2013 +0200

    Improved icon.

commit 53b231c403f809d282b85506b82aa2049cc919aa
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Thu Jun 6 12:05:36 2013 +0200

    Allow multi selection with single click.

commit db4b0310b93c24093e36878493ac6fdd7b0e7b69
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Thu Jun 6 11:29:00 2013 +0200

    Make sure tree selection works on search dialog reload.

commit eeb8990d365294bd31fcc3f8e2ad68ac3a13e3ba
Merge: 186abc8 b8972cf
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Thu Jun 6 11:10:27 2013 +0200

    Merge branch 'master' into feature-otrsmultiserviceselect-mab-master

commit 186abc8630b89b6e5d1741248d00814ec7bb9e23
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Thu Jun 6 11:10:00 2013 +0200

    Added tree view to search overlay and fixed some issues.

commit 5e0a5702667820ed115e210e572bcddb4f9bc01e
Merge: 02b9180 b0f809d
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Thu Jun 6 08:47:59 2013 +0200

    Merge branch 'master' into feature-otrsmultiserviceselect-mab-master

commit 02b91806643e2ee0662783d0112fe9a1eae8fb90
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Wed Jun 5 16:08:03 2013 +0200

    Updated to current development state.

commit 0d9236f1d8dabd4ec7be5f0ed963688801bad711
Merge: 7b3c145 387ebcb
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Wed Jun 5 08:35:05 2013 +0200

    Merge branch 'master' into feature-otrsmultiserviceselect-mab-master

commit 7b3c1452edb81b3114752a302a02e6b92c21afaf
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Wed Jun 5 08:34:39 2013 +0200

    Implemented search for tree selection.

commit e7e8b21f3eb5bfe265d20eba5e392388b45ec7f7
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Wed Jun 5 07:55:42 2013 +0200

    Fixed JS errors marked by JSLint.

commit dd0bb41dd2be5abed7973270f861a9c57ba3c8e1
Merge: 0263686 7982ea3
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Tue Jun 4 23:18:06 2013 +0200

    Merge branch 'master' into feature-otrsmultiserviceselect-mab-master

commit 0263686970f3b48c7989939c1286ee610f938738
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Tue Jun 4 23:17:48 2013 +0200

    Updated to current development state.

commit ac0dfa67b3a4204a2afdcabf115328ab5a43d359
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Tue Jun 4 22:42:46 2013 +0200

    Updated to current development state.

commit 2b2c9ebd23232455c297818bef8999012a69e7dd
Merge: db5cbd3 6ecfbc8
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Tue Jun 4 15:56:10 2013 +0200

    Merge branch 'master' into feature-otrsmultiserviceselect-mab-master

commit db5cbd31ddf7b8fbf80aad00e9be8be9abc9026e
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Tue Jun 4 15:54:13 2013 +0200

    Updated to current development state.

commit 93e7b9b3a7f93c142d3cd8cfcb04b649a58a6088
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Tue Jun 4 15:53:51 2013 +0200

    Updated to current development state.

commit 04d8ac083dbf5b441369342abdbe1d772b289268
Merge: 238e5ef 8b30f7f
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Mon Jun 3 14:29:09 2013 +0200

    Merge branch 'master' into feature-otrsmultiserviceselect-mab-master

commit 238e5ef32d6772e4437a968603fbf9b62029fe0f
Merge: 7634e43 fc235f6
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Mon Jun 3 11:41:58 2013 +0200

    Merge branch 'master' into feature-otrsmultiserviceselect-mab-master

commit 7634e43c96fc5ceadab6ddd3c28d968ecb9dffa2
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Fri May 31 09:13:15 2013 +0200

    Started implementation of overlay tree selection for BuildSelection

commit 6498b03c38e5486dfab50b5b1c40176c74590139
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Fri May 31 09:12:55 2013 +0200

    Started implementation of overlay tree selection for BuildSelection