Bugfix/12746 Node management window is not scrollable

[mmlado]

What does the PR do

In Node management the fields Mailserver interactions, Logs, and JSON-RPC will resize to the available space in the window, keeping roughly 1/3 of the space for themselves.

Fixes #12746

Affected areas

Node management

Architecture compliance

• I am familiar with the application architecture and agreed good practices.
  My PR is consistent with this document: QML Architecture Guidelines

Screencapture of the functionality

Impact on end user

Before: If the window was small, the user didn't see all the fields
After: If the window is small, the fields will shrink/grow to the available space in the window.

How to test

1. Select Node Management in the left pane.
2. Resize the window such that its vertical dimension is low.
3. Follow resize of the fields, on smallest size of the window all fields must be visible.

Risk

Cosmetic changes. Minimal risk.

[status-im-auto]

Jenkins Builds

❔	Commit	#️⃣	Finished (UTC)	Duration	Platform	Result
✔️	ac057c8	#1	2025-12-07 19:53:50	~21 min	linux/x86_64-nwaku	📦tgz

[caybro]

Otherwise looks good 👍

[caybro]

Why the preferredHeight: 0, fillHeight: true should already do the thing right?

[mmlado]

When multiple items have fillHeight: true QML uses secondary, implicit, parameter for it's height, which by default is based on the based on it's contents, so Logs, as it has the most content, will take up disproportional amount of space compared to the other two sections. With preferredHeight: 0 it's telling it to ignore the natural size preference and to only fill the available space evenly as all the sections have the same preferences for their size.

[caybro]

Ah right; these days you could use the new https://doc.qt.io/qt-6/qml-qtquick-layouts-layout.html#verticalStretchFactor-attached-prop

[caybro]

Nice work!