Improve interface for new game modes

[tooomm]

In #990 we spottet an issue with how game types are layed out currently. The way we present the options and combinations is limited and doesn't allow for further game implementations.
For now, Decadent got added to our second row of options as decadent sealed is a corner case. But with the already opened PR regarding glimpse draft (#1021) things get tricky.

But it looks like we basically found an agreement about adding a new layer for flexibility and all future possibilities to the game selection matrix already:

--> Game, Pool/Cards and Pick type:

Game Type	Draft	Sealed
Card Pool Type (=Booster Content)	Regular	Chaos	Cube	...
Picking Type (specific to draft game type)	Regular	Decadent	Glimpse	...
more? other?

More details and explanation: #990 (comment)

Only @HerveH44 didn't say what he things about it yet. :)

(Linking @keeler)

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Mentioned concerns so far:

@ZeldaZach:
I like tom's idea of a 3rd category, although it might add some excessive button clicks to the program.

Hmm. Can you elaborate further?
The Regular variants would always be preselected of course. So no additional clicks for creating a standard draft or sealed game room. In case one wants to play with a different card pool, that also doesn't involve more clicks as in the current implementation.

With new game modes and variations of Game, Pool and Pick type a lot of combinations are possible which is great. Therefore having "pre-configured options" that combine a combination of pool type and pick type and offer it as "Decadent Draft", "Glimpse Draft", "Rochester Draft" and so on would result in many more buttons and a bad interface.

@serokellcao:
Re — unnecessary cicks, I'd just have a text field w/ autocomplete as an
alternative input.

I'm not sure if I got you 100% right. How can a text field help with the needed "clicks" (consider the button hits to type)? Having a drop down menu is also not ideal IMO...

[tooomm]

Made a mockup for a potential look in the current UI:

[tooomm]

I revisited this after a while and updated the mockups with the new modal redesign:

Options could also be placed next to each other instead below to save space and decrease needed scrolling: