Fix some layout issues with the new dialog

* Slightly larger row height
* Make the default size slightly nicer
* Fixed a drawing artifact in certain styles

Note that the dialog will be resizable on linux now.

Reviewed-by: mae

src/plugins/coreplugin/dialogs/newdialog.cpp

@@ -95,7 +95,7 @@ public:
     }
 };
 
-#define CATEGORY_ROW_HEIGHT 18
+#define ROW_HEIGHT 24
 
 class FancyTopLevelDelegate : public QItemDelegate
 {
@@ -127,8 +127,8 @@ public:
     {
         QSize size = QItemDelegate::sizeHint(option, index);
 
-        if (!index.parent().isValid())
-            size = size.expandedTo(QSize(0, CATEGORY_ROW_HEIGHT));
+
+        size = size.expandedTo(QSize(0, ROW_HEIGHT));
 
         return size;
     }