New Order Improvements

[roma219]

1. Trim number after the . after calculated precised amount right before placing order
2. Make max length of inputs 9 - should be probably done throught some directive and modifying SimpleInput, or in actions when setting price/get/spent. e.g.:
   parseFloat(String(0.92342783462364234).substring(0,9)) (New order: price format #314)
3. Prevent placing order when user doesn't have anough BTS & show some kind of indicator about it. Also when spending BTS subtract bts fee from max amount available.

(#315)
6) Market order doesn't work properly in Sell mode

[roma219]

re: 9
Probably use something like this directive and apply it via props (similar to currently used restrict directive):
http://www.webspeaks.in/2017/07/custom-directives-in-vuejs.html

[hisinbox]

please shift volume fields a bit away (left/right) from the price field - to make sure that long volume entries do not intersect the circle (see the original mockup) @roma219 @plapinp17

[hisinbox]

also I noticed that price field (and circles) are to close to the button - there must be more space between the button and the circle @roma219 @plapinp17

[youaresofunny]

@hisinbox
Please make some separate issue if comments are actual
This task wasn't about markup)