Incorrect "Additional Boards Manager URLs" dialog field height

[per1234]

Describe the bug

Arduino IDE supports adding installing arbitrary boards platforms via Boards Manager by adding the URLs of their package index file to the "Additional Boards Manager URLs" preference.

Since users may have several URLs, a dedicated "Additional Boards Manager URLs" dialog is offered with a multi-line field.

🐛 The height of the field is very small, to the point where it is not clear that it is an input field at all.

To Reproduce

1. Select File > Preferences... from the Arduino IDE menus.
2. Click the button on the right side of the "Additional Boards Manager URLs" field.

🐛 The height of the field is very small:

Expected behavior

Usable input field height in the "Additional Boards Manager URLs" dialog, as it was in previous versions:

Desktop

• OS: Windows 10
• Version: 2.0.0-rc4-snapshot-0fc7c78
  Date: 2022-03-03T08:39:37.612Z
  CLI Version: 0.21.0 [10107d24]

Additional context

I bisected the bug to 112153f (it does not occur when using the build from the previous commit 69ac1f4).

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Originally reported at https://forum.arduino.cc/t/additional-boards-manager-urls-page-cant-read/965207

[KurtE]

Thanks @per1234 was just about to report it after downloading rc4...

I tried resizing the window using the resize part at lower right of text box, but it would only change horizontal size, not vertical.
Windows 10

[VE3EZB]

I have the same issue:

Processor Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz 3.19 GHz
Installed RAM 16.0 GB (15.9 GB usable)
Device ID F2DD9474-AF46-4403-8077-82B34F6BBDBA
Product ID 00330-80000-00000-AA808
System type 64-bit operating system, x64-based processor

Arduino IDE
Version: 2.0.0-rc5
Date: 2022-03-10T11:09:10.332Z
CLI Version: 0.21.0 [10107d24]

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