Fix known UI issues

[saifkhichi96]

The following UI bugs need to be fixed:

Broken Links

• Links to missing images on some pages:
  • OC pictures on the OSA page.

UX and Mobile Usability

• Navbar toggle opens the navbar on mobile, but cannot close it on second click.
• OSA page is too wide because of the incompatible OC table at the end of the page.
• The 'Recent Publications' section on home does not have the same horizontal spacing as other sections on mobile.
• The 'Our History' heading and text does not use correct horizontal spacing.
• 'See All' buttons should be moved upwards so they are closer to their respective sections instead of the section below them on the Publications page.