Improving the timesheet entry UI

[BeckyPollard]

RE: Improve time-entry ux to a point that it doesn't suck, Let the user know why their Entry was not submitted

Resolves #50.

This is part of an ongoing effort to make the timesheet view less suck.

Summary of changes:

• File and component name changes
  • TimesheetEntry.tsx → TimesheetDay.tsx because the component is rendering the day, not a single the day's row/entry.
  • EntryDay → TimesheetDay to match file name.
  • EntryDayItem → EntryItem because this is just one row/entry, does not care about the day.
  • EntryDayItem → EntryItemNew because this is just one row/entry, does not care about the day.
• Reduce the delay for submit when editing an entry, from 5 seconds to 1 second.
• Change how the new entry creation renders, now hidden behind a button.
• Light validation for new entry, requiring a project to be selected and safeguarding the submit with a prompr alerting that no project has been chosen.
• Add autoFocus to the accept button for the ConfirmModal for easier keyboard dismiss.

DEMO

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Feedback, nitpicks, and/or corrections encouraged. 🤖