WIP
Limit number of POIs and information desks (ref #1120)
Justify texts of POIs in trek export (ref #1120)
Add pictogram to recommandations (ref #1120)
Reorganize blocks inside template (ref #1120)
Add colored wave header (ref #1120)
Do not show attribute titles if value missing (ref #1120)
Trek export geometries are now translucid red by default (ref #1120)
Paths apparence in trek exports are now controlled by MAP_STYLES (ref #1120)
Merge pull request #1166 from makinacorpus/1120_more_template_improvements

More template improvements (fixes #1120)