React code challenge

Features:

1. Timer

   1. Start/Stop button to start/stop timer
   2. Hide/Show button to hide/show time label
   3. Reset button to reset timmer and notes
   4. With prosthesis checkbox to indicate whether a prosthetic attachment was used
   5. Notes field for notes specific to this test
   6. Submit button to add test to local records

2. Results

   1. Results are displayed in chronological order and display:
      1. Time
      2. With Prosthesis (true or false)
      3. Notes
   2. Filters:
      1. All: Displays all tests
      2. Without Prosthesis: Displays all test where a prosthesis was not used
      3. With Prosthesis: Displays all test where a prosthesis was used
      4. Button for selected filter will be highlighted
   3. Interpretations
      1. Avg time: Average time for all tests
      2. Avg Without Prosthesis: Average time for all tests where a prosthesis wasn't used
      3. Avg With Prosthesis: Average time for all tests where a prosthesis was used
      4. Average for selected filter will be highlighted
   4. Clear Results Button
      1. Clears all results