Start with templates split
Start passing filters values in DOM
Add test data
Start testing backpack
Serious backpack testing
Start testing duration filter
Test filters duration
Basic test for difficulty
Add test for filter by altitude (ascent)
Use DOM to initialize filters
Use DOM values to match trek in sliders
Build DOM using settings and trek attributes
Move filter location hash to separate file
Change popup behaviour (again)
Make sure no filter is stored in localStorage