#5683 implemented loading animation for open layers map viewer
preview map in geo setting resizable to find desired aspect ratio and with height
further improvements in the geo settings ui and preparation for hybrid map preview
harmonizing and simplifying the map settings
validation of map aspect ratio and documentation improvements
#5385 openlayers maps adapt to parent DOM element width and the map aspect ratio can be set instead of fixed width and height
moving content of folder 7.x up to the repository root