Make all the lines of paintop options look the same

Grid and Shape paintops do not have any checkable options, so their
option lists look very different from the other paitops.

krita/ui/kis_categorized_item_delegate.cpp

@@ -86,6 +86,16 @@ QSize KisCategorizedItemDelegate::sizeHint(const QStyleOptionViewItem& option, c
         for(int i=0; i<index.model()->rowCount(); i++) {
             QSize indexSize = QStyledItemDelegate::sizeHint(option, index.model()->index(i, 0));
             m_minimumItemHeight = qMax(m_minimumItemHeight, indexSize.height());
+
+            /**
+             * Make all the items, including the ones having
+             * checkboxes look the same.
+             */
+            QStyle *style = QApplication::style();
+            QStyleOptionButton so;
+            QSize size = style->sizeFromContents(QStyle::CT_CheckBox, &so, QSize(), 0);
+
+            m_minimumItemHeight = qMax(size.height(), m_minimumItemHeight);
         }
     }
     return QSize(QStyledItemDelegate::sizeHint(option, index).width(), m_minimumItemHeight);