Fix issues with flow layout sizing when too small

qrenderdoc/3rdparty/flowlayout/FlowLayout.cpp

@@ -1,3 +1,4 @@
+// clang-format off
 /****************************************************************************
 **
 ** Copyright (C) 2015 The Qt Company Ltd.
@@ -156,6 +157,16 @@ QSize FlowLayout::minimumSize() const
         size = size.expandedTo(item->minimumSize());
 
     size += QSize(2*margin(), 2*margin());
+
+    // we use the previous height as a hint for the minimum size otherwise we'll never request
+    // enough height for multiple rows
+    size.setHeight(qMax(size.height(), heightForWidth(m_prevRect.width())));
+
+    // we use the previous width as a minimum, otherwise if we have a long item which expands
+    // up to a large width in our minimum, other layouts might starve us of enough height
+    // because it will assume we are sized to the minimum.
+    size.setWidth(qMin(size.width(), m_prevRect.width()));
+
     return size;
 }