Option to increase information density

[mofojed]

As a power user, I want increase the information density to allow for more information to appear on the screen at once. Things like reducing column/row padding in grids, decreasing font size, decreasing padding in plots, decreasing tab padding/size, etc.

[dsmmcken]

We default slightly higher in font-size and in cell y-padding, and marginally higher in x-padding. A higher density option that lowers font-size and padding would increase density, we should also offer the reverse.

[dsmmcken]

In terms of just the table:

1px taller text, and overall cell height is 3px taller per cell.

Horizontally it's mixed, some cells are wider by default some are narrower, but padding is still larger. Overall though we come out slightly wider.

[dsmmcken]

In practice, on a fresh console running a single command, we are showing 6 rows less than swing. We lose a bit of space from browser chrome, but also we are proportionally allocating more space to the console (we have less ui-chrome in the console panel). So we could reduce it's default height and still be comparable. Currently it's 50/50 split, but maybe 40/60 or something would be a better default. Our tabs are slightly taller, and so are out header columns, but I think there's value in that in terms of click target size and would prefer to squeeze elsewhere.