lp1645862 Default Grid Width OU Settings

lp1645862 Default Grid Width OU Settings

- Create eg.grid Library setting types for existing grids, mirroring workstation setting types
- Add Grid action to save Grid configuration as an Org Unit Setting.
- Ensure grids prefer Workstation grid config settings before OU-based grid configs.

Signed-off-by: Kyle Huckins <khuckins@catalyte.io>
 Changes to be committed:
	new file:   Open-ILS/src/eg2/src/app/share/grid/grid-toolbar-save-config-dialog.component.html
	new file:   Open-ILS/src/eg2/src/app/share/grid/grid-toolbar-save-config-dialog.component.ts
	modified:   Open-ILS/src/eg2/src/app/share/grid/grid-toolbar.component.html
	modified:   Open-ILS/src/eg2/src/app/share/grid/grid-toolbar.component.ts
	modified:   Open-ILS/src/eg2/src/app/share/grid/grid.component.ts
	modified:   Open-ILS/src/eg2/src/app/share/grid/grid.module.ts
	modified:   Open-ILS/src/eg2/src/app/share/grid/grid.ts
	modified:   Open-ILS/src/sql/Pg/950.data.seed-values.sql
	new file:   Open-ILS/src/sql/Pg/upgrade/xxxx.data.lp1645862-default-widths-for-grid-columns.sql