Change the evaluate worksheet icon at worksheet entry from view-refresh to system-run
Summary: Currently the icon in worksheet entry is an icon for "refresh/update" something. The use of "run" icon is consistent with the action in Cantor window and it improves a bit the usability for run worksheet entries.
Reviewers: asemke, sirgienko
Reviewed By: asemke
Subscribers: kde-edu
Differential Revision: https://phabricator.kde.org/D15012