Health indicator and Turret stats extended

- Health indicators  extended with Shield (blue) and Armor (yellow) bars.

- Health bar is always visible for enemies. Shield bar is only visible if its value is greater than 0. Armor is similar, but it is also visible if the Shield value is greater than 0, so these indicators have a common look.

- Turret stats panel now shows the Health damage (white), Armor damage (yellow) and Shield damage (blue). Damage increae per level is also updated to have the same coloring.

- Current ammo text on the Turret stats panel is set to blue to follow the same coloring order that the other texts have.