CaretModelImpl.beforeDocumentChange->CaretImpl.updateCachedStateIfNeeded->CaretImpl.getOffset call chain cannot work with myIsInUpdate = true,
previously (by accident) we never got into such a call chain (due to code in EditorImpl.beforeChangedUpdate)

* added `cidr.test.framework.showIndexingAsTask:false` registry value that hide any test indexing activity
* small logging improvement

update ui after discussions with UX

py.test reruns failed tests using its own machinery, we only need to provide same arguments. No need to modify anything else

do not perform iteration over all visual lines when only one line has changed

folding model consistency (constraint preventing the existence of identical fold regions) is now enforced by model's interval tree's implementation

platform: report proper error if value of incorrect type is returned for PlatformDataKeys.SELECTED_ITEMS (EA-99464)