Search field filters

[jyc8]

I've been adding various filters for search fields; these updates are pretty obscured so I'll keep track of some of these features here:

'Select Hero' field and 'Select Hero from List' field

• Entering a numeric value will return heroes with BST greater than or equals to the value.
• Entering "infantry", "armored", "flying", or "cavalry" will return heroes with corresponding movement.
• Entering "red", "blue", "green", or "gray" will return heroes with corresponding color.

'Select Skills' field

• Entering a numeric value will return skills with SP cost greater than or equals to the value