[INTERNAL] sap.m.Input: HCB Theme Optimization

- moved the selectors from the "Additional HCB styles" section to their
relevant places in the original file structure
- removed some redundant selectors

Change-Id: I8cc3551158165e98b793befa944e47b37e4c574b
Merge "[INTERNAL] sap.m.Input: HCB Theme Optimization"