normalize app component font styles

[brad-decker]

depends on #9693

This PR is a piece of the larger #9074 PR. The recent rebase to include the swaps feature puts it into a state of needing full review once again. To minimize the pain and to keep the conversation on the PR from being too broad I have split it into a handful of smaller PRs. This PR focuses on App components which are not as broadly used as UI components.

[metamaskbot]

Builds ready [1f9816a]

• builds: chrome, firefox, opera
• bundle viz: background, ui, inpage, contentscript, ui-libs, bg-libs, phishing-detect
• dep viz: background
• all artifacts

Page Load Metrics (440 ± 67 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	29	80	39	11	5
		domContentLoaded	246	806	438	140	67
		load	247	807	440	141	67
		domInteractive	245	806	438	140	67

[darkwing]

😍

[darkwing]

Excellent!

[Gudahtt]

LGTM! Except it needs a rebase.

[metamaskbot]

Builds ready [26c213a]

• builds: chrome, firefox, opera
• bundle viz: background, ui, inpage, contentscript, ui-libs, bg-libs, phishing-detect
• dep viz: background
• all artifacts

Page Load Metrics (432 ± 73 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	29	97	40	17	8
		domContentLoaded	241	667	431	151	73
		load	242	669	432	151	73
		domInteractive	240	666	431	151	73