Minimum height of dialog field to avoid endless flickering

[Hb---]

What steps will reproduce the problem?

1. Copy https://tiles0.planet.com/basemaps/v1/planet-tiles/australia_wildfire_weekly_visual_2020-01-20_to_2020-01-27_mosaic/gmap/{zoom}/{x}/{y}.png?api_key=ExampleForLongURLText
2. Open the Imagery preferences.
3. Click TMS, the Add Imagery URL dialog opens as shown in the screenshot.
4. Paste the long URL into the first field

What is the expected result?

That the pasted long URL is accepted.

What happens instead?

The from field takes the whole size of the dialog box.
The text flickers endlessly like being reformatted.
Can't enter a name for the imagery and can't click OK.

Please provide any additional information below. Attach a screenshot if possible.

Error happens only under Java 8 for long texts when the initial height of the field is smaller than the usual font size in the dialog.

1. For a first solution, please make this whole dialog wider.

2. Why does Java/JOSM present text input fields which are taller than the font?

Java 13 seems to format the whole dailog box different and present bigger text fields.

Initial dialog size:

Flickering field:

Attached screenshots are reduced by 50% in size.

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2020-03-10 23:31:54 +0100 (Tue, 10 Mar 2020)
Build-Date:2020-03-11 02:30:52
Revision:16111
Relative:URL: ^/trunk

Identification: JOSM/1.5 (16111 en) Windows 7 64-Bit
OS Build number: Windows 7 Professional (7601)
Memory Usage: 1818 MB / 3604 MB (109 MB allocated, but free)
Java version: 1.8.0_242-b08, AdoptOpenJDK, OpenJDK 64-Bit Server VM
Screen: \Display0 1280x1024
Maximum Screen Size: 1280x1024
VM arguments: [-Djosm.home=jtest]
Program arguments: [--language=en]
Dataset consistency test: No problems found

Plugins:
+ buildings_tools (35248)
+ utilsplugin2 (35334)

[Don-vip]

Can you please try with the "Windows" look-and-feel instead of "Windows Classic"?

[Hb---]

Replying to Don-vip:
I do use a "Classic" theme for the complete OS. So the initial report was already based on the JOSM look&feel "Windows".

Switching the JOSM look&feel to Windows Classic gives the result of a non flickering first field. The bug is therefore not present.

But the Name field is still not accessible, see screenshot. It becomes visible when the dialog size is increased by dragging its border.

[gaben]

@Hb--- Is is still reproducible with any recent Java version?