Various improvements
This MR makes various improvements to the Plasma Mobile homepage:
- Fixed the line-height in the intro section
- Optimized overall spacing between content
- Made sure the img tags are no longer a direct descendant of a flex container as this can mess up the aspect ratio of the image
- Fixes an horizontal overflow on the mobile layout
- Changed the markup of the laptop overlay to be in line with aether-sass!40 (merged)