Fix ecobenefit styling
Break benefit_value_row out into template
Add UI for separate tree/resource ecobenefits
Add template variable for hiding summary info

Certain parts of ecobenefit calculations are not relevent to single-mapfeature ecobenefit calculations, like separate section headers for tree/resource (because it's obviously either one or the other) and calculation basis (since it's always equal to 1). Add option to hide these so that single-mapfeature calculations can be rendered easily.
Merge pull request #1186 from steventlamb/topic/resource_eco_ui

Topic/resource eco ui