DirtyValue: add possibility to mark DirtyValue updated #2207
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Adds the ability to manually mark a DirtyValue as updated.
This simplifies situations where a the user (or any other condition) selects if a value should be updated.
Example: In my Star Trek watch face I give the possibility to show weather or not. Using this function, I do not have to duplicate the weather updating code to the button press handler or introduce another variable
weatherNeedsUpdate
. I can just make the corresponding element visible, mark the weather data as updated (although it really isn't), and the next normal refresh loop will put the correct weather information.