Solved crash when mapping is missing;
Show molecular formulas in reactions only after implicit hydrogens are added.
corrected some lines of the English localization help
implemented ctrl-M to show/hide the atom-to-atom mapping in reaction. the lines are green now
solved crash when no libsSpatialization is found and .navmol config is not created yet
Do not remove explicit hydrogens when loading reactions; Do not show mapping lines; corrected typo in Portuguese localization; Implemented sorting by distance of the atoms in dialog when adding bond;
Prefere atom participating in the reaction when switching between moleclues
Announce when no known fragments are found in the molecule;