Minor fixes:
* min value allowed on input (was 1, now is 0.0001)
* Number filter with 4 decimals
Fixes: number variables forced to be a Number type.
More tests for amounts validation
Fixes:
* Copy available funds to input (amount) on Chrome browser.
* Improve style of topAvailable button.
* Show valid message immediately after copy.
* Hide link if not have funds
Fixed test and new test entry for new method
Merge pull request #759 from cmgustavo/bug/01-amount-input

Bug/01 amount input