Purses
Purses is an addon that can preselect a quest reward for daily quests. It was initially just meant for the Argent Tournament dailies to preselect the Champions Purse (hence the name Purses). But with a few tweaks it could be used for any daily.
To add an item to the preselectionlist just doubleclick it in the quest dialog. The item will be marked with a border (see screenshot). To remove the autoselect just doubleclick it again.
Have fun
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