Improves default “Local View”  so that it can also isolate
faces, verts, and edges in Edit Mode, using the same button.

If You don't like :
   - Pressing 4 keys (Shif+H , Alt+H) just to isolate selected elements.

   - That default "Local view" (num /) works only on objects and not faces...

   - That Alt+H changes your selection and unhides other hidden objects.

This is for You, it isolates and restores objects or elements with single button and preserves your selection, similar to Isolate object in Maya.