Updated thirdparty JavaScript libraries, notably jQuery 1.10.

Squashed commit of the following:

commit 4f95b8936222089aeff36c4babb92a1996a90b3e
Author: Martin Gruner <martin.gruner@otrs.com>
Date:   Mon Jun 3 12:59:37 2013 +0200

    Removed obsolete .toggle() function.
    Removed quote-hiding function because JS in iframes is not allowed any more.

commit 03bcb7f2f857a86e0eb292a3103535a61d1ae92b
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Mon Jun 3 12:54:43 2013 +0200

    Fixed usage of html() due to changes in jQuery 1.9.

commit 09735321444b6d5da46d4da7287e700692d68253
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Mon Jun 3 12:00:09 2013 +0200

    Removed debug code.

commit 764a7953af3bc64007049c0e6cb35a47b0c3d202
Author: Marc Bonsels <marc.bonsels@otrs.com>
Date:   Mon Jun 3 11:37:05 2013 +0200

    Use datepicker.show() instead of triggering focus().

commit faff121a153c5baea8659a42da9703f414c6819f
Author: Martin Gruner <martin.gruner@otrs.com>
Date:   Mon Jun 3 11:17:16 2013 +0200

    Changed .attr('selected') to .prop()

commit 61972e04fa5d54eeeee877bdd870d3a2b054c2e8
Author: Martin Gruner <martin.gruner@otrs.com>
Date:   Mon Jun 3 10:28:34 2013 +0200

    Replaced all .attr('checked') with .prop('checked').

commit b4faab599350d4b9b0705936a5c813552f194f6a
Author: Martin Gruner <martin.gruner@otrs.com>
Date:   Mon Jun 3 10:14:30 2013 +0200

    Changed .live() calls to .on().

commit a18ff3ff81cf4f6c9ec56f630b4df10c12bb61d4
Author: Martin Gruner <martin.gruner@otrs.com>
Date:   Mon Jun 3 10:00:03 2013 +0200

    Fixed browser detection. Removed old thirdparty files.

commit ba1446a08bc9aeab563ad29334b1d4319b26c11c
Author: Martin Gruner <martin.gruner@otrs.com>
Date:   Mon Jun 3 08:54:26 2013 +0200

    Revert "Started removing deprecated jQuery functions. Migration plugin still running for logging issues."

    This reverts commit 07552130f907c5ca7309ca38ef891767e7950131.

commit 07552130f907c5ca7309ca38ef891767e7950131
Author: Marc Nilius <marc.nilius@otrs.com>
Date:   Tue May 28 01:23:27 2013 +0200

    Started removing deprecated jQuery functions. Migration plugin still running for logging issues.

commit 6ce8c7543fdb5aeb1b204ab3711bd66833590575
Author: Marc Nilius <marc.nilius@otrs.com>
Date:   Tue May 28 01:00:18 2013 +0200

    Added new versions of thirdparty JS tools and fixed unit tests.