Fix kudo amount input.

[marcianosr]

What

Explain what changes inside the code, this can be as simple or complicated as you want as long as it's clear

Why

Explain why these things are changes. This explanation is for your colleagues and your future self.

Code Review

Please consider the following checklist when reviewing this Pull Request.
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• [ ] Does the code actually solve the problem it was meant to solve?
• [ ] Is the code covered by unit tests? Integration tests?
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• [ ] Is the code easy to understand and change in the future?
• [ ] Is the same code or concept duplicated? Find a balance between DRYness and readability.
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[codeclimate[bot]]

Code Climate has analyzed commit 7ab8e9f8 and detected 2 issues on this pull request.

Here's the issue category breakdown:

Category	Count
Duplication	2

The test coverage on the diff in this pull request is 0.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 12.8% (0.0% change).

View more on Code Climate.

[sandercamp]

Nice one! Made it work without resorting to hacky solutions I see.

Minor thing I noticed: when a value is selected and I want to change it again the cursor is positioned before the input value. Backspace will still empty the field though.