Usability issue when using the issue navigation

[cdroege]

Hi,

there is a usability issue when using the issue navigation in this plugin, that prevents using the enter key in the text input field of an issue. You can reproduce it with the following:

1. Open an issue with related issues
2. Select an related issue with a mouse click, so that is it highlighted
3. Press arrow down key
4. Click edit issue
5. Type something in the input field for the issue and then press enter

This causes the browser to navigate to the related issue although the user expects to insert a newline in the text input field.

A workaround for this is to remove the HK.bindIssuesTableKeys() call in hotkeys.js