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Bug
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    Resolution: Duplicate
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  Not Evaluated                     
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    None
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    1.2
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    Win/Linux/Mac (All OS)
 
If you Select All first and then uncheck few items, you were unable to Select All again.
Other use case: first deselect all, then reselect few items and after this you can not press the "Deselect All" button anymore.
This issue may be similar to:  QTIFW-84
- is replaced by
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QTIFW-84 "Select All" and "Disselect All" take no effect for Updater
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 - Closed
 
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