Be able to specify three-letter display codes in config file for DirectMode about osvr-rendermanager

[rpavlik]

Would prefer to have that just come with the display info in the descriptor, since that's not rendermanager-specific - so an HDK could say, hey, here's an array of possible hardware IDs that I might have:

"hardwareIds": [
  [ "SEN", "1019"],
  [ "SVR", "1019"]
]

(Yes, I'd vote for including the product ID in string form as hex, and then parsing it with std::stringstream with a std::hex modifier - because nobody normally interacts with those in decimal. Some VR software uses the product id in decimal, but it's not pretty.)

[russell-taylor]

If we're going to parse as hex, the values should be "0x1019" to avoid confusing the person making the files. Or they can be named with a name that has hex in it rather than just un-named string members.

We don't currently need the product ID for RenderManager's purposes, just the vendor ID.

Glad to have this issue moved to core if you prefer.

[rpavlik]

Sounds good to add the prefix. I think to avoid it getting unwieldly the tuple-style arrays are OK with the 0x in them. We'll need product ID for core, and presumably at some point for more fine-grained direct mode controls.

Yes, I'd like this to be core.

[russell-taylor]

Handled in 74a2042