1706 use jsx file extension

[entrotech]

Partial Step toward #1706

What changes did you make?

• Changed the File Extension of all code files containing JSX to *.jsx instead of .js
• Also modified imports that included *.js, or *.jsx extensions in referencing the imported components.

Why did you make the changes (we will use this info to test)?

• To comply with file naming standards, improving tooling recognition of files containing JSX code, and prepare for migrating from Create React App to another build tool.

Issue-Specific User Account

none

Screenshots of Proposed Changes Of The Website (if any, please do not screen shot code changes)

(no visible changes)