Refactor show applications footer and its CSS

[tatebosler]

The show applications footer works great, but should have a few CSS tweaks made, such as:

• Improve usability on iPhone X (requires a change to the full-page CSS, but this would define safe areas and allow the footer to expand to the full width of the screen in landscape)
• Adjust vertical alignment of all items, particularly those on the left side
• Maybe reposition “Changes saved” to be somewhere else on mobile?