[plasma-pa] Increase minimum size of expanded plasmoid
Summary:
When outside of the tray, the plasmoid felt really cramped. This makes it more bearable.
Before:
After:
Reviewers: Plasma, broulik, drosca, ngraham
Reviewed By: ngraham
Subscribers: abetts, ngraham, plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D19013