QmlJSInspector: Fixed position of crumble path menu

These buttons are not in a regular layout so they were not being resized
down to the available size. Just specify a fixed height on all levels
now, and make sure it is consistent.

src/plugins/qmljsinspector/qmljscontextcrumblepath.cpp

@@ -42,7 +42,6 @@ ContextCrumblePath::ContextCrumblePath(QWidget *parent)
     : CrumblePath(parent)
     , m_isEmpty(true)
 {
-    setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
     updateContextPath(QStringList(), QList<int>());
 }