Fix markdown edited cell height on reload

Fixes #118581

Make sure we don't update a markdown cell's height based on the preview if only the editor is visible

src/vs/workbench/contrib/notebook/browser/view/renderers/markdownCell.ts

@@ -75,7 +75,9 @@ class BuiltinMarkdownRenderer extends Disposable implements IMarkdownRenderStrat
 		} else {
 			this.localDisposables.clear();
 			this.localDisposables.add(markdownRenderer.onDidRenderAsync(() => {
-				this.viewCell.renderedMarkdownHeight = this.container.clientHeight;
+				if (this.viewCell.editState === CellEditState.Preview) {
+					this.viewCell.renderedMarkdownHeight = this.container.clientHeight;
+				}
 				this.relayoutCell();
 			}));
 

src/vs/workbench/contrib/notebook/browser/viewModel/markdownCellViewModel.ts

@@ -11,7 +11,7 @@ import * as nls from 'vs/nls';
 import { IConfigurationService } from 'vs/platform/configuration/common/configuration';
 import { BOTTOM_CELL_TOOLBAR_GAP, BOTTOM_CELL_TOOLBAR_HEIGHT, CELL_MARGIN, CODE_CELL_LEFT_MARGIN, COLLAPSED_INDICATOR_HEIGHT, MARKDOWN_CELL_BOTTOM_MARGIN, MARKDOWN_CELL_TOP_MARGIN } from 'vs/workbench/contrib/notebook/browser/constants';
 import { EditorFoldingStateDelegate } from 'vs/workbench/contrib/notebook/browser/contrib/fold/foldingModel';
-import { CellFindMatch, ICellOutputViewModel, ICellViewModel, MarkdownCellLayoutChangeEvent, MarkdownCellLayoutInfo, NotebookLayoutInfo } from 'vs/workbench/contrib/notebook/browser/notebookBrowser';
+import { CellEditState, CellFindMatch, ICellOutputViewModel, ICellViewModel, MarkdownCellLayoutChangeEvent, MarkdownCellLayoutInfo, NotebookLayoutInfo } from 'vs/workbench/contrib/notebook/browser/notebookBrowser';
 import { MarkdownRenderer } from 'vs/editor/browser/core/markdownRenderer';
 import { BaseCellViewModel } from 'vs/workbench/contrib/notebook/browser/viewModel/baseCellViewModel';
 import { NotebookCellStateChangedEvent, NotebookEventDispatcher } from 'vs/workbench/contrib/notebook/browser/viewModel/eventDispatcher';
@@ -28,8 +28,10 @@ export class MarkdownCellViewModel extends BaseCellViewModel implements ICellVie
 	}
 
 	set renderedMarkdownHeight(newHeight: number) {
-		const newTotalHeight = newHeight + BOTTOM_CELL_TOOLBAR_GAP;
-		this.totalHeight = newTotalHeight;
+		if (this.editState === CellEditState.Preview) {
+			const newTotalHeight = newHeight + BOTTOM_CELL_TOOLBAR_GAP;
+			this.totalHeight = newTotalHeight;
+		}
 	}
 
 	private set totalHeight(newHeight: number) {