[Pharo-project] [ANN] 10266 Merge tool SUnitGUI Setting Integration Enh

Issue 710: Merge Tool diff fix Fixes for edge cases when handling conflicts. Fixes for original MC merge browser. SUnitGUI Improvement - do not offer to test coverage of kernel/collection/exception/sunit packages, that will only crash the system - do not consider methods with <ignoreForCoverage> annotation - improving the error messages - don t try show a list if all methods are covered - really save the history - do not wrap abstract methods, they won t be called anyway - update the history even after coverage is run Settings Integration enh - Code cleaning (less classes, more comments) Alain I could not load 45 so I load 39 for now. Stef