Finish SVG library

[jamesmisson]

#1557 adds new SVG icons. Separate this out into a new PR that uses the SVG components in the current buttons, and add outstanding icons.

Outstanding icons that need creating:

• Home button (depends on Review new icons for buttons #1804)
• Expand left panel (depends on Review new icons for buttons #1804)
• Expand right panel (depends on Review new icons for buttons #1804)
• Layers
• Image adjustment
• Mobile information
• Mobile open navigation panel
• Big paging button left
• Big paging button right