Issue 10371: Fix inline editor in PolyGerrit

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***** !!!! THIS BUG TRACKER IS FOR GERRIT CODE REVIEW !!!!  *****
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***** DO NOT SUBMIT BUGS FOR CHROME, ANDROID, CYANOGENMOD,  *****
***** INTERNAL ISSUES WITH YOUR COMPANY'S GERRIT SETUP, ETC.*****
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*****   THOSE ISSUES BELONG IN DIFFERENT ISSUE TRACKERS     *****
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Affected Version: master, stable-2.16

What steps will reproduce the problem?
1. create your change and publish
2. edit the change
3. then delete the edit
4. then re edit the same file.

What is the expected output?
It not to restore any prevous cached versions.

What do you see instead?
It restores a cache version.

Please provide any additional information below.