UI: Fix initialization bug when launching without existing profile

SetupNewProfile is used to create new profiles when OBS is already
running, which requires resetting program state for the new profile.

This function cannot be used to create a new profile as a fallback
for either a non-existing profile or for a fresh installation of OBS
Studio because by the point this is called from OBSBasic::OBSInit, the
runtime modules are not loaded yet and as such no services exist.

Activating the new profile without a profile reset fixes this issue
as the reset will be done explicitly by OBSBasic::OBSInit later.
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