[web] [fix] [ENG-536] disable input prop by default

Summary: From @palys-swm comment in D4023, input disabled prop should be set to false by default.

Test Plan:
Flow shouldn't error, inputs fields work as intended and are enabled by default

Grep the codebase, make sure there aren't disabled={true} props in the code base and that might disable input fields.

Reviewers: palys-swm, atul, def-au1t, yayabosh

Reviewed By: palys-swm

Subscribers: ashoat, Adrian, palys-swm

Differential Revision: https://phabricator.ashoat.com/D4035