Fix input regression affecting HTMLForms that use VForm

Although the classes (e.g. mw-ui-input) are still there,
the style module was not being loaded.

This affects forms that deliberately use VForm even without
wgUseMediaWikiUIEverywhere (since they pre-date it).

This applies at least to PasswordReset, which was added in
d32891d99f185e5cf2b0e25bf947de221d4c3295 (last October).

Bug: 71448
Change-Id: Ieca36c0036d4c93244c533237eddd678564dd3c0
Merge "Fix input regression affecting HTMLForms that use VForm"