Merge pull request #1627 from ramox81/codex/plotdate-refresh

Fields: evaluation events, UPDATEFIELD, FIELDEVAL, per-field shading and PlotDate redraw.

# Conflicts:
#	Cargo.lock
#	src/entities/field.rs

src/app/update/file.rs

@@ -2163,6 +2163,14 @@ impl OpenCADStudio {
 
     #[cfg(not(target_arch = "wasm32"))]
     pub(in crate::app) fn prepare_native_save(&mut self, i: usize) {
+        // A save is a field evaluation event (FIELDEVAL bit 2).
+        self.tabs[i].scene.update_fields(2, None);
+        self.prepare_snapshot_save(i);
+    }
+
+    /// Bring the drawing state the file stores up to date, without the save
+    /// event an autosave does not raise.
+    pub(in crate::app) fn prepare_snapshot_save(&mut self, i: usize) {
         self.sync_view_state_for_save(i);
         sync_annotation_scale_header(&mut self.tabs[i].scene);
         self.stamp_header_sysvars(i);
@@ -3297,7 +3305,7 @@ impl OpenCADStudio {
             if !self.tabs[i].dirty || self.active_save_jobs.contains_key(&self.tabs[i].id) {
                 continue;
             }
-            self.prepare_native_save(i);
+            self.prepare_snapshot_save(i);
             let version = self.tabs[i].scene.document.version;
             let target = self.autosave_target(i);
             tasks.push(self.queue_native_save(
@@ -3800,8 +3808,7 @@ impl OpenCADStudio {
         let i = self.active_tab;
         let hosts = crate::entities::field::stamp_plot_fields(&mut self.tabs[i].scene.document);
         if !hosts.is_empty() {
-            let changes: Vec<_> = hosts.into_iter().map(|h| (h, crate::scene::ChangeKind::Modified)).collect();
-            self.tabs[i].scene.bump_entities(&changes);
+            self.tabs[i].scene.bump_text_hosts(&hosts);
             self.tabs[i].dirty = true;
         }
     }