Fix #56818. Mouse position validation for folding, scm and comments.

src/vs/editor/contrib/folding/folding.ts

@@ -339,7 +339,7 @@ export class FoldingController implements IEditorContribution {
 				// const gutterOffsetX = data.offsetX - data.glyphMarginWidth - data.lineNumbersWidth - data.glyphMarginLeft;
 
 				// TODO@joao TODO@alex TODO@martin this is such that we don't collide with dirty diff
-				if (gutterOffsetX < 10) {
+				if (gutterOffsetX < 5) { // the whitespace between the border and the real folding icon border is 5px
 					return;
 				}
 

src/vs/workbench/parts/scm/electron-browser/dirtydiffDecorator.ts

@@ -712,7 +712,7 @@ export class DirtyDiffController implements IEditorContribution {
 		const gutterOffsetX = data.offsetX - offsetLeftInGutter;
 
 		// TODO@joao TODO@alex TODO@martin this is such that we don't collide with folding
-		if (gutterOffsetX < 0 || gutterOffsetX > 10) {
+		if (gutterOffsetX < -3 || gutterOffsetX > 6) { // dirty diff decoration on hover is 9px wide
 			return;
 		}