Swarm styles, refresh on load, more combined stats, more info in table

[mrv777]

Description

Some more tweaks for the swarm page

• Decrease the white space around the manual swarm add
• When the page is loaded it should refresh the data right away
• Allow the user to set the refresh interval
• Increase the temp threshold for the temp warning color
• Have total hash on its own line and adjust spacing there

[mrv777]

Added:

• Total power on swarm page
• Best diff from all devices on swarm page
• Made these stats cards for better styling

[mrv777]

Added voltage regulator temp to swarm table too, if available

[skot]

this LGTM!