Update potato links to use proper a tags and not JavaScript to open

[Fippe94]

Add middle clicking on potato links. Works for other links ni chat but not AP/PP links. i.e. clicking with mouse wheel on link should open in new tab (without switching tab to that new tab, which is done when left-clicking)

[antiaverage]

Update potato links to use the a tag instead of js

Fixes #71

→ <<cset 9af35e9ba8cb>>

[Alan Beam]

Update potato links to use the a tag instead of js

Fixes #71

→ <<cset 9af35e9ba8cb>>