ZSHORTAGE_MAINTENANCE

Interesting program, including editable ALV with drop downs. This is an
OO program but doesn’t use a custom parameters screen.
Merge branch 'master'

Conflicts:
ZSHORTAGE_MAINTENANCE/ZSHORTAGE_MAINTENANCE.abap
Merge branch 'master' of https://github.com/sulonen/abap

Conflicts:
	ZSHORTAGE_MAINTENANCE/ZSHORTAGE_MAINTENANCE.abap