TC PREP - PCM Inbox - Fixes required for the creation pop up window

Problem Statement

The pop up up window for PCM creation from the inbox screen can use a few enhancement to replicate closer the same beahviour as the main PCM screen.

• GSC Sub Type field does not adjust based on the selection of GSC Type....this creates the risk of creating inconsistent combination of GSC type and Sub Type
• The GRP drop down only functions by scrolling and does not allow to search by typing

Acceptance Criteria

• make the GSC Sub Type drop down dependent of the GSC Type selection
• vice versa, if a sub type is selected first, GSC Type gets automtically populated as the rightful parent
• GRP field is enabled for text search as well