Booleanize localstorage settings from older versions of LGV to avoid crash

[cmdcolin]

Fixes bug found by @carolinebridge-oicr when loading LGV with the localstorage populated with older "0"/"1" for settings instead of "true"/"false"

Git blame traces to here d509556#diff-16ff04395edd82556eb8f6df4a771c9d56a968b512fba86976d5ace75344d2cbL212

Error message @carolinebridge-oicr reported

react-dom.production.min.js:101 Uncaught Error: [mobx-state-tree] Error while converting `0` to `boolean`:

    value `0` is not assignable to type: `boolean` (Value is not a boolean).
    at pt (mobx-state-tree.module.js:3847:12)
    at Ge (mobx-state-tree.module.js:3440:15)
    at Ze (mobx-state-tree.module.js:3426:9)
    at t.value (mobx-state-tree.module.js:7105:17)
    at t.value (mobx-state-tree.module.js:7078:54)
    at mobx-state-tree.module.js:6130:42
    at mobx-state-tree.module.js:6328:64
    at Array.forEach (<anonymous>)
    at t.value (mobx-state-tree.module.js:6328:32)
    at t.value (mobx-state-tree.module.js:6129:18)