Werk #762: Fixed availability filters not opening in IE7

Component	User interface
Title	Fixed availability filters not opening in IE7
Date	Mar 28, 2014
Level	Prominent Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.2.5i1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

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