The 'value' field of the info shows the effective value that gets
applied. Set it as the actual byte value rather than the formatted
value which could be using any arbitrary unit suffix (within the
scope of the suffixes actually supported).
In the UI, always show the effective value, rather than only when
there is a global value, and explicitly say when there is no value
configured.
Note that the UI changes are only in GWT because the project info
screen is not implemented for Polygerrit on this branch. The same
changes can be applied to Polygerrit in a follow-up commit after
this has been merged up to stable-2.15/master.
Change-Id: Ibb88d734e6a322ee90f66d1b4c4a3882d2e0654a
33f544a075