Zabbix

..F....... [ZBX-17653] fixed new widget placeholder behavior and dashboard height calculation in edit mode

* commit 'd494a139d094194e9044cc0a43f22f1e42d9c8b8':
  ..F....... [ZBX-17653] fixed ChangeLog
  ..F....... [ZBX-17653] fixed extensive grid height when entering dashboard edit mode
  ..F....... [ZBX-17653] refactored function name
  ..F....... [ZBX-17653] fixed typo
  ..F....... [ZBX-17653] refactored new widget placeholder functionality
  ..F....... [ZBX-17653] refactored duplicated code into a function
  ..F....... [ZBX-17653] fixed placeholder shown/position after clicking Add Widget having widget copied before, and if no widget clicking Add Widget and then clicking Escape
  ..F....... [ZBX-17653] fixed placeholder position when widget was copied and trying create widget and then pressing Escape
  ..F....... [ZBX-17653] fixed dashboard height on window resize and fixed placeholder visibility on delete last widget when cursur outside the dashboard
  ..F....... [ZBX-17653] fixed placeholder position and size when widget was copied and trying create widget
  ..F....... [ZBX-17653] added two new methods to widget placeholder, fixed logic in dashboard element mouseleave method, fixed placeholder position in delete widget method
  ..F....... [ZBX-17653] removed unneeded expression in calculating dashboard height
  ..F....... [ZBX-17653] fixed typo in a comment
  ..F....... [ZBX-17653] fixed dashboard calculating height after deleting widget

(cherry picked from commit e43d524704986d02333df04a6834602893bf7bea)