Factor out multiple returns from `HS_AppInit()`, `HS_SbInit()` and `HS_TblInit()`

[thnkslprpt]

Checklist

• I reviewed the Contributing Guide.
• I performed a cursory search to see if the bug report is relevant, not redundant, nor in conflict with other tickets.

Describe the bug
The only places multiple returns remain in HS are in HS_AppInit(), HS_SbInit() and HS_TblInit(). This is unnecessary.

Expected behavior
Refactor to a single exit point.

Reporter Info
Avi Weiss @thnkslprpt