Component props form: style plain text, link, textarea, bool, and select elements

@balintbrews: deprioritizing per #3454094-77: Milestone 0.1.0: Experience Builder Demo → .

Thanks for your work on this @shyam_bhatt and @gauravvvv - I have left some feedback on the MR. Some code changes and also a small change to bring the input and textarea in line with some updated designs that just came in (changing grey backgrounds on them to white).