Add a "pause" function to "Split features" tool

[diomitri]

"Split features" tool already exists in the core Advanced Digitizing Toolbar (though with different icon), so perhaps we should provide some extra functionalities, as compared to original tool:

1. "Split features" tool should behave as "Fill ring" tool, in case of when drawing a splitting line, the line closes to itself
2. When we need to split a complex part of the polygon, we have to draw a consecutive polyline that will split polygons we do not want to split. A 'pause' functionality (under a shortcut) should be added to be able to draw line parts between existing polygons Both functionalities already exist in ArcGIS (Cut polygon tool)

[bstroebl]

DigitizingTools does not double any core functionality, see the documentation on Split features. As to your proposals: I do not know current ArcGIS, so you should elaborate them a bit. AFAIU proposal 1 is covered by core's fill ring tool, whereas I do not see the point in proposal 2. If you select a feature, only this feature is split, so there is no chance to split polygons you do not want to split.