Query Editor: Hide overflow for long query names

[zuchka]

Fixes #53900

Special notes for your reviewer:

Explore before:

Explore after

Panel editor before:

Panel editor after:

[grafanabot]

The backport to v9.2.x failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new branch
git switch --create backport-58840-to-v9.2.x origin/v9.2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x d9b8b761e9b2a6da4f9fdc88afc9a646e52f3364
# Push it to GitHub
git push --set-upstream origin backport-58840-to-v9.2.x
git switch main
# Remove the local backport branch
git branch -D backport-58840-to-v9.2.x

Then, create a pull request where the base branch is v9.2.x and the compare/head branch is backport-58840-to-v9.2.x.