Enforce using mech status icons, remove mech status colors

[Raugharr]

MekWars apparently has the ability to show the status of a mech via icons instead of using colored backgrounds, but it had to be enabled. I think this is a much better way of doing it, so instead of having it configurable, these are forced to always be on.

[sandysimonton]

Insanely cool! Is there a way where we can test that if there is a really damaged mek that all the icons show up properly (in the right space, not on top of each other, etc.)?

[Raugharr]

Sorry for the long delay on this PR, but the answer was no it didn't. I ended up rewriting to code so the icons section would expand if there were more icons.

I also spend a bunch of time trying to add a tooltip to each of the icons when hovered over. That seems to be impossible as in order to do that you need to know the position of each icon as it is layed out. However the CellRenderPane detaches every cell from the JComponent hierarchy and sets their width/height to 0, only restoring it to the hierarchy to draw it.

The icons also take up extra space so I set the default to show 7 mechs instead of 10.

MekWarsClient/src/mekwars/client/gui/dialog/UnitViewerDialog.java was also removed as it was never actually used and seems to be replaced by NewUnitViewerDialog.java