import is not success when window is has no record

When window at state no record
+ search with wrong key
+ or delete all record
if import prev export record, never success.

redo:
1. make a "export package" record
2. make a "package details" record
3. export "export package" to csv file
4. make a find with wrong key to make window has no row.
5. import file csv => not success.

reason.
1. import "export package" record is success
but when import "package details" record
code at:line 1566 class GridTab return true.
if (m_parentNeedSave) return true;