[UI] small glitch in domain name input field

[luclu]

Clicking the field at the top will set the cursor to the start position of the field:

[ericjarvies]

If text is typed into the search field, and user moves cursor position back to the beginning of said written text, when user types, only the first letter is written at the beginning, but all subsequent letters are written to the end of the existing text. The below video shows an example;

Eric

Mac OS X 10.12.06 Ethereum/Mist 0.9.0