Already made a corresponding patch, would upload it tomorrow.

Patched with https://phabricator.kde.org/D4204

> Plasmoid can't be set to declared minimumWidth due to error on calculation of appletItem minimumWidth and due to error in resize handler.

I believe you, but can you explain what the error actually is (here or on phabricator with your patch)
Otherwise I have to redo all the investigation you just did..

I'm assuming it's this change?
 var minimumWidth = appletItem.minimumWidth + appletHandle.width;

Explained it all in patch in Phabricator.
Copy:
This bug was because of mess in size relationship. Because of it plasmoid wouldn't get smaller than Layout.minimumWidth + 2 * handleWidth. Bug was in appletItem minimumWidth(where in appletContainer.margins.right was included first excess handleWidth) calculation and in AppletHandler.qml resize calculation(resizeHandle.onPositionChanged where in calculation of var minimumWidth was included second excess handleWidth).

The patch was accepted and merged; can this be marked as RESOLVED?

Dear Bug Submitter,

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Patch was merged, this should have been closed.