some improvements

test/git-two-rows.test.tsx

@@ -103,7 +103,7 @@ describe('a file that is staged and then edited again', () => {
     expect(splitText(c, 'right')).toEqual(['a', 'STAGED', 'c', 'AFTER-STAGING'])
   })
 
-  it('the hover panel behind Actual always reaches back to HEAD', async () => {
+  it('the picked panel behind Actual always reaches back to HEAD', async () => {
     const c = await boot()
     fireEvent.click(group(c, 'Changes')[0])
     const scroll = await waitFor(() => {
@@ -112,7 +112,7 @@ describe('a file that is staged and then edited again', () => {
       return el
     })
     // Line 2 is 'STAGED'. Unwrapped, its band runs from 10 + (2-1)*20.
-    fireEvent.mouseMove(scroll, { clientY: 10 + 20 + 5 })
+    fireEvent.click(scroll, { clientY: 10 + 20 + 5 })
     const peek = await waitFor(() => {
       const p = c.querySelector<HTMLElement>('.peek')
       if (!p) throw new Error('peek not ready')
@@ -121,7 +121,8 @@ describe('a file that is staged and then edited again', () => {
     const removed = Array.from(peek.querySelectorAll('.ln-row.del'))
     expect(removed.map((el) => el.textContent?.replace(/^\d+/, ''))).toEqual(['b'])
 
-    fireEvent.mouseLeave(scroll)
+    // A click anywhere off the code drops it.
+    fireEvent.mouseDown(document.body)
     await waitFor(() => expect(c.querySelector('.peek')).toBeNull())
   })