Use icons instead of "PvP", Dmg", etc

[ShadowNinja]

We can use the same icons as the client.

From minetest/minetest.github.io#100.

[farooqkz]

Also a better looking table.

[sfan5]

u wot m8, my table is beautiful

(no seriously, what should be changed?)

[farooqkz]

I'm not sure what should be changed, I am not a Web developer or a CSS expert, but I know it can be more beautiful than your ugly one :D