Interface change size on some actions

[gigimon]

Exchange window resizes after some actions.

Steps to reproduce:

1. Open exchange interface
2. Select new pair
3. Wait button "Approve " and check size
4. Approve coin and check size
5. When we have a long button interface increase width
6. Moreover, when popover shows up all page blink (change fonts, size)
7. Moreover when remove liquidity after click "50%" on first time block change size too