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I don't know that QML enums existed back when this component was created
(they were introduced in Qt 5.10). Either way, they do now, so we should
use them.

This compinent suffered from various rookie mistakes:
- Making assumptions about its parent item
- Setting width and height properties of items in Layouts
- Hardcoded heights rather than using units

All are fixed. Visual changes are extremely minimal.

(cherry picked from commit 3345f405)

When accessing a Loader's item, you always need to also check to make sure
that the loader has an item (it may not).

In case of conflict in i18n, keep the version of the branch "ours"
To resolve a particular conflict, "git checkout --ours path/to/file.desktop"

should fix Windows build

Otherwise they elide, but there's no need for this since there's plenty
of vertical space because the view is scrollable.

BUG: 425834
FIXED-IN: 20.12.0

BUG: 425601

resets to default value before each test

modify the default value for play at start when needed

fix ability to do a proper usage of KConfig generated code in automated
tests

use KConfig in automated test

fix missing directory name and missing directory icon

also export them correctly at startup

avoid the clickable zones for artist, album to be always at maximum
width and extending further beyond the text

inversed macros to check Qt version

(cherry picked from commit 1ae2db61)