Resolve "Fix environments MR widget button spacing"

What does this MR do?

• Fixes wrong button spacing between Deploy & Review Apps in MR widget

Screenshots

Current Version

Fix

Note: The test case above displays every single button, clipping the status text on the left. This scenario with every button does not happen in production.

Does this MR meet the acceptance criteria?

Conformity

• I have included changelog trailers, or none are needed. (Does this MR need a changelog?)
• I have added/updated documentation, or it's not needed. (Is documentation required?)
• I have properly separated EE content from FOSS, or this MR is FOSS only. (Where should EE code go?)
• I have added information for database reviewers in the MR description, or it's not needed. (Does this MR have database related changes?)
• I have self-reviewed this MR per code review guidelines.
• This MR does not harm performance, or I have asked a reviewer to help assess the performance impact. (Merge request performance guidelines)
• I have followed the style guides.
• This change is backwards compatible across updates, or this does not apply.

Availability and Testing

To reproduce the UI above, checkout branch 283908-fix-environments-mr-widget-button-spacing-2--test-cases (link) and run it against a MR that has an ongoing pipeline.

• I have added/updated tests following the Testing Guide, or it's not needed. (Consider all test levels. See the Test Planning Process.)
• I have tested this MR in all supported browsers, or it's not needed.
• I have informed the Infrastructure department of a default or new setting change per definition of done, or it's not needed.

Related to #283908 (closed)