EDIT

ref #6596 Replace CTRL+S keybinding with our own binding

• this is done via model processors
• this allows to use our SaveHandler to handle all save events

ref #6596 Enable "Save" icon when specimen editor is dirty

ref #6596 Add SaveHandler for specimen editor

ref #6566 Add generic "open part" handler to model fragment

ref #6566 Refactor src folder to src/main/java

ref #6566 Migrate help menu

ref #6566 Initial import of taxeditor.workbench plugin - moved general menu contributions to this plugin