Improve usability at higher browser zoom levels #508

Review and document issues when using Weavly at a high browser zoom level. Per the WCAG guidelines, at a minimum we want to support a zoom level of 200%. Ideally we would like to support even higher levels.

• Test high zoom levels with a range of browsers and window sizes
• Test with browser-specific zoom/accessibility options, such as:
  • The "zoom text only" option enabled in Firefox
  • The "never use font sizes smaller than" feature in Safari
  • The "very large" font size override in Chrome

Zoom options available in Safari (2021):

Original Jira issue: https://fluidproject.atlassian.net/browse/C2LC-455