Merge branch 'tparam'
Merge branch 'tparam'
Merge branch 'tparam'
Change template parameters of tetengo2::gui::widget::widget (wip) #18
Revert "Change template parameters of tetengo2::gui::widget::widget (wip) #18"

This reverts commit 2d7d6275e6ef5bd10a491dcdc4c8eecd249a5edb.
Merge branch 'master' into tparam