Description

OpenLayers WMS requests are, by default, 1.5 times bigger than the current screen size.
We should configure the default to 1 and allow overriding it from configuration.

Steps to reproduce

• A list of steps to reproduce the bug
• Configure a WMS layer as "Single Tile"
• using Chrome DevTools look at GetMap requests width and height
• a 1.5 ratio is used (leaflet does not do that)

Expected Result

• The requested image is as big as the browser window, not bigger

Current Result

• The requested image is 1.5 times as big as the browser window

Other useful information (optional):