v2.7.8

• Provide cleaner layout and styles for browse view controls.
• Improve mobile navigation toggle and aria labels. (Fix #34)
• Other accessibility improvements include:
  • better link contrast
  • hiding iconfonts from screen readers
  • removing custom focus styles
  • using the <main> landmark for the main content area
• Avoid collisions within tag cloud.
• Fix featured record homepage styles from applying to featured search filters.
• Implement CSS variables for colors.
• Update dependencies.