QGIS2WEb Leaflet file structure

After exporting from QGIS2Web into the different formats available, I am going for Leaflet. I want to change the order of information displayed in the popup, to fix the position of the label above the marker and to change the boldness of the font (and if possible with a thin white line around the letters)

So far I managed to get the zoom I needed, to change the svg marker to the legend markers, to get a dashed line for some polygon.

Could someone point me into the direction or is there a description somewhere of what each file related to the index.html is doing ?