Fix date controls showing multiple in standalone charts

[kean]

Fixes https://linear.app/a8c/issue/CMM-750/new-stats-the-date-picker-in-post-details-displays-more-than-one-line

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack by scanning the QR code below to install the corresponding build.

	App Name	Jetpack
	Configuration	Release-Alpha
	Build Number	28973
	Version	PR #24840
	Bundle ID	com.jetpack.alpha
	Commit	f9a3ba2
	Installation URL	0rddm7nhk0veo

Automatticians: You can use our internal self-serve MC tool to give yourself access to those builds if needed.

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress by scanning the QR code below to install the corresponding build.

	App Name	WordPress
	Configuration	Release-Alpha
	Build Number	28973
	Version	PR #24840
	Bundle ID	org.wordpress.alpha
	Commit	f9a3ba2
	Installation URL	2p41p5vum4sh8

Automatticians: You can use our internal self-serve MC tool to give yourself access to those builds if needed.