Add support for specific socket matching

[Apollys]

The UI would look like:

• Text box where user can type in a socket string, e.g.: B-B-G
• X can serve as a placeholder for any socket color, e.g.: B-B-G-X
• Larger box below displaying all current socket strings, and remove button (similar to BaseTypes)

More examples of input strings:

• BBX matches 2 blue sockets and any third socket. If there is any fourth socket, that matches too.
• B-B XX matches a four socketed item with 2 linked blue sockets.
• B-X-X-X matches any four link with at least one blue socket. Important: order independent.

[Apollys]

Added in dev.