caok2709

Results 3 issues of caok2709

1. allow focus on the input box when copy

1. allow range input element to show max/min as a boundary. 2. When you move slider close to max/right value. It should looks like: 450/1200 -> 500/1200 -> 600/1200 3....

**Is your feature request related to a problem? Please describe.** No. **Describe the solution you'd like** Right now, it looks like rdkit-js only have the ability to do the Substructure...