[bisq-network/bisq] Unable to scroll down on pop-up windows (#4036)

[huey735]

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### Description

On smaller screens the full height of a pop-up window inside Bisq may not be visible and the user is unable to scroll down to have access to the information, text fields, and buttons at the bottom.

<!-- brief description of the bug -->

#### Version

1.2.7

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### Steps to reproduce

<!--if you can reliably reproduce the bug, list the steps here  -->

Use a resolution of the screen bellow 1600x1024 and press Ctrl+f to open the Bisq Filter tool.

### Expected behaviour

<!--description of the expected behaviour -->

The user should be able to scroll down to have access to the content not present on the screen.

### Actual behaviour

<!-- explain what happened instead of the expected behaviour -->

The user cannot scroll down and is left only with the option to close the window by pressing Esc.

### Screenshots

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![Bisq-screenresolution](https://user-images.githubusercontent.com/44140017/76215363-85a91d00-6206-11ea-95fb-88ff36a383e7.png)


#### Device or machine

<!-- device/machine used, operating system -->

Tested on Pop!_OS and [13-inch macbook, OS 10.15.3 catalina as reported by an user](https://bisq.community/t/edit-filter-list-window-cannot-by-closed-or-minimized-except-escape/9073)


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https://github.com/bisq-network/bisq/issues/4036
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