Replacing instances of 'testnets' with 'test networks'

[ryanml]

[metamaskbot]

Builds ready [f62fd2b]

• builds: chrome, firefox, opera
• builds (beta): chrome, firefox, opera
• builds (flask): chrome, firefox, opera
• build viz: Build System
• code coverage: Report
• storybook: Storybook
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6, 7, 8
  • common: 0, 1, 2, 3
  • content-script: 0
  • contentscript: contentscript
  • disable-console: disable-console
  • inpage: inpage
  • phishing-detect: phishing-detect
  • policy-load: policy-load
  • sentry-install: sentry-install
  • ui: 0, 1, 2, 3, 4, 5

Page Load Metrics (736 ± 33 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	615	939	735	68	33
		domContentLoaded	614	947	735	70	33
		load	614	947	736	69	33
		domInteractive	613	947	735	70	33

highlights:

storybook

• ui/components/app/metamask-translation/metamask-translation.stories.js
• ui/pages/confirm-add-suggested-token/confirm-add-suggested-token.stories.js
• ui/pages/confirm-approve/confirm-approve.stories.js
• ui/pages/confirm-deploy-contract/confirm-deploy-contract.stories.js
• ui/pages/confirm-encryption-public-key/confirm-encryption-public-key.stories.js
• ui/pages/confirm-import-token/confirm-import-token.stories.js
• ui/pages/confirm-send-ether/confirm-send-ether.stories.js
• ui/pages/confirm-token-transaction-base/confirm-token-transaction-base.stories.js

[mcmire]

LGTM!