* Add network proportion to homepage and /vspinfo.
Proportion is calculated using the number of tickets currently registered with the VSP, divided by the total size of the network ticket pool as reported by `getblockheader`.
The value will only ever be an estimate because:
- it's possible for a single ticket to be added to multiple VSPs.
- vspd does not distinguish between immature and live tickets, whereas `getblockheader` only reports live tickets.
- `getblockheader` is reporting the size of the ticket pool as of the previous block, not the current block.
* xaur suggestions
* Show missed ticket %, not just the raw number.
Previously the voting wallet status and the ticket search were stacked on top of eachother, making the page very long and awkward to navigate. This introduces tabbed navigation which allows just one to be displayed at a time.
- Use bootstrap to improve layout.
- Add warning banners for webserver debug mode and vspd closed.
Admin page:
- Replace listing of all tickets with form to search by ticket hash
* Add support email to gui.
* Use Decred fonts
* Use Decred favicon
* Add pubkey to homepage. Use properly typed struct for template data.
* go mod tidy
