void saveProgram(Program program) {
		if (program == null) {
			return;
		}
		if (program.canSave()) {
			save(program);
		}
		else {
			saveAs(program);
		}
	}
Prompt user for programs to be saved.
Caller must already have lock on all programs contained within the list.
@return true if it is safe to close tool
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/progmgr/ProgramSaveManager.java