Remove auto focus on reps for starting a plan

Doesn't feel right to open the reps immediately on
a page with so much content. The keyboard hides some of the
stuff on the bottom. Also I find myself opening a plan up just
to see what's on that day rather than editing right away.

StartPlan.tsx

@@ -121,7 +121,6 @@ export default function StartPlan() {
           onSubmitEditing={() => weightRef.current?.focus()}
           selection={selection}
           onSelectionChange={e => setSelection(e.nativeEvent.selection)}
-          autoFocus
           innerRef={repsRef}
         />
         <MassiveInput