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    Sub-task 
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    Resolution: Done
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    P1: Critical 
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    None
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    None
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        2021wk10PO2, 2021wk12PO3, 2021wk14PO2, 2021wk16PO2, 2021wk18PO2
Update version string for documentation, Boot to Qt demos and qtdeviceutilities. All in own repos.
More info from gronoff
| For Gerrit Dashboard: QTBUG-91975 | ||||||
|---|---|---|---|---|---|---|
| # | Subject | Branch | Project | Status | CR | V | 
| 344795,3 | Doc: Bump version to 5.15.4 | 5.15 | qt-apps/boot2qt-demos | Status: MERGED | +2 | 0 | 
| 344801,2 | Bump version to 5.15.4 | 5.15 | qt/qtdeviceutilities | Status: MERGED | +2 | 0 | 
| 344844,2 | Bump version to 5.15.4 | 5.15 | tqtc-boot2qt/doc | Status: MERGED | +2 | 0 |