Web: Launch Options (Fixes #104)

[Foldex]

Fixes a conflict between base and full on the launch dialog, and adds radio button theming.

[tkashkin]

"Always use this option" should probably be a checkbox.

The same applies to "Remember me" in the Login dialog (it is a checkbox already) and to DLC/Workshop checkboxes.

[tkashkin]

Also do you have any ideas on how to make it look less weird when the options list is overflowing (screenshot in #104).
With your fix it should fit 4 options, but the problem will reappear with 5 or more.

In the worst case it should be possible to set border-radius for the whole scrollable container, but ideally the list should expand and not be scrollable at all if possible (unlikely).

[Foldex]

Added the checkbox changes.

I did move some minor dialog changes to the base theme as well, but they're fairly deserved I think. Might be worth discussing if we want to move some other dialogs to it as well. The uninstall dialog for example.

Also do you have any ideas on how to make it look less weird when the options list is overflowing

I got nothing that isn't worse in other ways, might just have to bite the bullet. Five different launch options is a bit unlikely, and people are likely to hit the "always" option and not see it again anyway.