Merge branch 'tparam'
Merge branch 'tparam'
Merge branch 'tparam'
Merge branch 'tparam'
Change template parameters of tetengo2::gui::drawing::system_color_set #18
Revert "Change template parameters of tetengo2::gui::drawing::system_color_set #18"

This reverts commit 6ffba4a448bf4e4b63ad686c1c0264c0da45218c.
Merge branch 'tparam'
Merge branch 'tparam'
Merge branch 'tparam'
Correct lint warings #18
Change template parameters of tetengo2::gui::drawing::canvas_traits #18
Remove tetengo2::gui::widget::traits::widget_traits::dimension_type and size_type #18
Modify type aliases of tetengo2::gui::drawing::canvas_traits #18
Change template parameters of tetengo2::gui::scroll_bar #18
Correct check_test_cases.sh
Merge branch 'tool'
Merge branch 'master' into tparam
Correct compilation errors #18