Bug 1009271 - opened window.open dialog link as view activity

- fix activityclose typo in activity window
- No transition when the callee is caller
- add sheets window dialog test case
- always use AWM.activeApp.getTopMostWindow() as caller
Merge pull request #20477 from gasolin/issue-1009271-3

Bug 1009271 - opened window.open dialog link as view activity, r=alive