[FEATURE] sap.m.ViewSettingsDialog: Implemented keyboard handling -
trigger ESLint validation

- Implemented keyboard handling functionality for [SHIFT] + [ENTER] to
trigger the Back button of the view settings dialog(if available).
- Implemented unit test. 

Change-Id: I693be14ff2696fffe0937f184506cbd25df298a3
Merge "[FEATURE] sap.m.ViewSettingsDialog: Implemented keyboard handling - trigger ESLint validation"