Merge pull request #1613 from ramox81/codex/sheet-set-manager

Sheet Set Manager, NEWSHEETSET / OPENSHEETSET and sheet set fields, with review fixes.

# Conflicts:
#	Cargo.lock
#	src/app/control/actions.rs
#	src/app/mod.rs
#	src/app/settings.rs
#	src/app/update/dialog.rs
#	src/app/update/file.rs
#	src/app/update/mod.rs
#	src/app/view/mod.rs
#	src/ui/dock.rs
#	src/ui/ribbon/mod.rs
#	src/ui/window/field_dialog.rs
#	src/ui/window/mod.rs

src/app/update/mod.rs

@@ -96,6 +96,7 @@ mod blocks_palette;
 mod dialog;
 mod dynamic;
 mod file;
+pub(in crate::app) use file::background_task;
 mod page_setup_import;
 mod style;
 pub(in crate::app) mod util;
@@ -1822,6 +1823,7 @@ impl OpenCADStudio {
             Message::FieldDialog(message) => self.on_field_dialog(message),
             Message::PcManager(message) => self.update_pc_manager(message),
             Message::Count(message) => self.on_count(message),
+            Message::SheetSet(message) => self.on_sheet_set(message),
             Message::RibbonSelectTab(idx) => {
                 self.ribbon.select(idx);
                 Task::none()
@@ -8555,6 +8557,10 @@ impl OpenCADStudio {
                 if self.active_modal == Some(super::ModalKind::CountInvalidArea) {
                     return self.update(Message::Count(crate::ui::window::count_palette::CountMsg::InvalidUndo));
                 }
+                if self.active_modal == Some(super::ModalKind::SheetSet) {
+                    self.close_sheet_set_dialog();
+                    return Task::none();
+                }
                 if self.active_modal == Some(super::ModalKind::Field) {
                     self.close_field_dialog();
                     return Task::none();