Thanks Antti. However, I have been customizing the forms you mentioned but the system isn't functioning as it should.
There are currently 3 areas that we are experiencing an error due to the Time Entry Grid control deprecation:
1. Select row on the grid and click Edit Row, it opens up the Edit Row form (that’s good!).
BUT Doing the same process again (Select row on the grid and click Edit Row), it opens up a “New Time Entry” form:

2. Notice only one record is selected and clicking on Edit Row opens up a “Change Multiple Records” form:

3. Clicking on a cell and entering time on the grid directly will grey out/disable the cell:

When I click on Refresh, the greyed out duration entry disappears:

Thoughts?