ProgressBar
The ProgressBar can be used to display the progress of something. By setting the value the size of the bar changes.

Important Properties:
- 
Indeterminate - symbolizes that the status of the progress is unknown e.g. that the progress is still waiting for something before it can be started
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Value - The value to be displayed in the ProgressBar.
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Max - The maximum value that the ProgressBar will take.
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Min - The minimum value that the ProgressBar will take.