Added new world wide topographic to background maps
Added new orthophoto lidar products to background maps
Added new central photograms to background maps
Added sheet name on product downloads of sheet type
Updated background maps on PDF generation
Updated timeout connection with geolocation server to 10s
Updated email messages text to include OS information
Improved reference layers only zoom when there are not elements visibles
Improved time series dialog refreshment to avoid too many events
Improved menu icons management
Fixed problem with download toolbar button and last download action
Bypassed problem with QtRangeSlider in old versions of QGIS and MAC/OS