[AnsoCode]

Summary

• At 1280 the compose editor laid Save & Deploy, its options chevron, and Close editor past the window, so Save & Pull Images could not be opened without widening the window.
• The toolbar wraps inside the editor pane when one row does not fit. The Save button and its chevron stay together. At 1920 the toolbar stays one row.

Test plan

• At 1280x800, Save & Deploy, the options chevron, and Close editor sit inside the window. Opening the chevron shows Save & Pull Images.
• At 1440x800 the toolbar wraps and every control stays inside the window.
• At 1920x1080 the toolbar stays one row, with the actions on the right.
• At 390x844 the phone editor still shows Save and Save & Deploy, and the page does not scroll sideways.
• Editor view unit tests pass, and the frontend typecheck is clean.