Generalize View::object_selections into map

This allows using multiple distinct state histories. By default, all history is also cleared any time a view's selection is set, unless explicitly told to save the state. This way, we can have control over when selection history is saved.
helix-editor · Mar 6, 2023 · ae01866 · ae01866
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commit ae01866
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diff --git a/helix-term/src/application.rs b/helix-term/src/application.rs
@@ -225,10 +225,10 @@ impl Application {
                         // NOTE: this isn't necessarily true anymore. If
                         // `--vsplit` or `--hsplit` are used, the file which is
                         // opened last is focused on.
-                        let view_id = editor.tree.focus;
+                        let view = view_mut!(editor);
                         let doc = doc_mut!(editor, &doc_id);
                         let pos = Selection::point(pos_at_coords(doc.text().slice(..), pos, true));
-                        doc.set_selection(view_id, pos);
+                        doc.set_selection(view, pos);
                     }
                 }
                 editor.set_status(format!(