fix: hide overflowing tree-toggle content

[web-padawan]

Description

Added styles to the slot element as suggested by vaadin/flow-components#2429 (comment)

Fixes vaadin/flow-components#2429

Type of change

• Bugfix

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[tomivirkki]

Works well on all supported browsers

[jouni]

Seems like a clean and simple solution. Let’s hope we didn't miss any edge cases that this might trigger🤞(I didn't come up with any right away).

[vaadin-bot]

Hi @web-padawan , this commit cannot be picked to 22.0 by this bot, can you take a look and pick it manually?
Error Message: Error: Command failed: git cherry-pick 32deef3
error: could not apply 32deef3... fix: hide overflowing tree-toggle content (#3525)
hint: After resolving the conflicts, mark them with
hint: "git add/rm ", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".

[vaadin-bot]

This ticket/PR has been released with Vaadin 23.0.2.

[vaadin-bot]

This ticket/PR has been released with Vaadin 23.1.0.alpha1 and is also targeting the upcoming stable 23.1.0 version.