Merge pull request #2536 from xillibit/k31_bugs9

Update atwho.js library to v0.4.12
Replace mootools part for preview by jQuery part
Merge pull request #2537 from xillibit/kdev-patch-4

Replace mootools part for preview by jQuery part
Crypsis | Add file and Preview does not work #2538 (fix preview)
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Fix locked icon
Merge pull request #2540 from xillibit/kdev-patch-4

Crypsis | Add file and Preview does not work #2538 (fix preview)
Merge pull request #2541 from 810/develop-fixes-1-7

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