Investigate documentation stating Dispatch normally need not be called

[SteffenL]

@Le0Developer pointed out in #26 that Dispatch might need clarification when I suggested that Dispatch should be called.

    // Dispatch posts a function to be executed on the main thread. You normally
    // do not need to call this function, unless you want to tweak the native
    // window.
    Dispatch(f func())

We should investigate whether this comment is accurate, and either amend it or fix the behavior.