uitest: use the new cell content enter function

Change-Id: I75ff56a903226797284dff7f556bd425d40b4fd4

uitest/calc_tests/gridwindow.py

@@ -9,6 +9,8 @@ from uitest_helper import UITest
 
 from helper import mkPropertyValues
 
+from uihelper.calc import enter_text_to_cell
+
 import time
 
 try:
@@ -32,6 +34,11 @@ def input(xContext):
 
     xGridWindow = xTopWindow.getChild("grid_window")
 
+    enter_text_to_cell(xGridWindow, "C3", "=A1")
+    enter_text_to_cell(xGridWindow, "A1", "2")
+
+    time.sleep(2)
+
     ui_test.close_doc()
 
 def special_keys(xContext):