Invalid credentials message on Bittrex is cut off

[cjdowner]

Summary
Bittrex account connect error message could be handled better.

Steps to reproduce
Go to add a new Bittrex account, but enter in a wrong/invalid API Key / Secret

Expected results
The warning should show, but as it's on two lines, the text field/button constraints should move down (whilst marginally increasing the window height). Maybe errors could be designed differently, but that's not a quick fix.

Actual results
The error message is over two lines, but there's only room for one. Turns out you can scroll.

Notes
macOS 10.13.2, BalanceOpen 1.0 Beta

Is there a missing word from this copy? "...Make sure you have right API and Secret pair.` Should be "...the right..." ?

Low priority issue.

[einsteinx2]

Yeah we need to increase this size just a bit. Was fitting to Christian's design spec but it looks like that won't work. Also good catch on the copy. Both are easy fixes.

[einsteinx2]

Pretty sure that error is coming directly from Bittrex. We'll work on improving general connection error display later. I'll make another issue for it. For now I'll just increase the size of that text area by 10pt so at least it's not cut off.

[einsteinx2]

Actually that's not correct. It's our error. However, the errors are in the api code which is being massively refactored and is almost done, so holding off on this until that's ready.

[einsteinx2]

Blocked on #470