UI: Fix squashed icons in Help Center dialog

Description When opening the Help Center dialog from the profile dropdown, the document/article icons on the left side of the list items are being compressed (squashed) horizontally. This is likely due to the flexbox container not protecting the icon's base width when the text content expands or wraps.

Steps to Reproduce Log in to Papermark.

Click on the Profile/User Dropdown.

Select Help Center.

Observe the orange document icons next to the article titles.

Expected Behavior The icons should maintain their aspect ratio and fixed dimensions regardless of the length of the title or description text.

Screenshots