I finally found how to do what I wanted.
The following solution is for a dashboard with 3 rows, no app bar, no navigation bar. In order for the rows to adjust their height so that the whole dashboard fills up the entire browser window, you add:
<param name="height">25vh</param>
to all your FlashChart modules like this
<module name="FlashChart">
<param name="width">100%</param>
<param name="height">25vh</param>
<module name="ConvertToDrilldownSearch">
<module name="ViewRedirector">
<param name="viewTarget">flashtimeline</param>
</module>
</module>
</module>
This makes the height of the FlasChart 25% of the "view height", which is the height of the browser. I picked 25% as a compromise, because this applies the selected height only to the chart, it doesn't take into account the height used by other graphic parts. So, it isn't a perfect solution, but it's much better than before.
... View more