New version of HESK: 2.7.3

[Klemen]

HESK has just been updated to version 2.7.3

This release improves some existing functionality and fixes a few bugs.

UPDATE FROM VERSION 2.7.x:
1. Login to your HESK admin panel
2. Go to "Settings" and click the "Check for updates" link
3. Download available update and read HOW TO INSTALL.html

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UPDATE FROM OLDER VERSIONS:
1. Download Full installation file
2. Open docs/step-by-step-guide.html and read instructions under "Upgrading from old versions"

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CHANGELOG:
HESK Changelog

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Code changes in DIFF format:
HESK 2.7.2 to 2.7.3 unified diff


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