Software Update checkbox cropped

[Behrang]

See the checkbox next to "Security updates" in the attached screenshot.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Sebastien Bacher (seb128)]

There is an hirsute report so that's still an issue, screenshot

https://launchpadlibrarian.net/537421870/Screenshot%20from%202021-05-06%2018-15-02.png

The description points out it happens when there are several package update groups, for example a security section in addition of the normal one

[PJSingh5000 (pjsingh5000)]

This issue seems to only occur when there are more than one category of updates (Such as "Security updates" and "Other updates").

STEPS TO REPRODUCE
------------------
This issue occurs on Ubuntu 20.04 thru 21.04.

Ubuntu 20.04 version is over a year old, and there are both "Security" and "Other" updates available, so it is a good environment to reproduce this issue...

1. Boot into 21.04 Live ISO
2. Open Software Updater
3. Notice that Notice that the "Security updates" checkbox is cropped.
4. Notice that Notice that the "Other updates" checkbox is cropped.

[PJSingh5000 (pjsingh5000)]

Screenshot of Security Updates Section

[PJSingh5000 (pjsingh5000)]

Screenshot of Other Updates Section

[PJSingh5000 (pjsingh5000)]

I see that the issue is present when *only* "Security updates" are available.

Previously, I had proposed that this issue only ouccurs when there are more than one category of updates (Such as "Security updates" and "Other updates").