Add power level to the user details dialog

The only way to check a user's power level is to haul yourself over to
the member list, which is cumbersome but also hard to parse - especially
if a room has lots of members.

This adds the user's power level to the existing details dialog. For
example, this makes it easier to identify someone as a moderator if they
sent a message in the room.

src/utils.h

@@ -12,6 +12,8 @@
 
 #include <Quotient/user.h>
 
+#include "enums/powerlevel.h"
+
 using namespace Qt::StringLiterals;
 
 class QmlUtils : public QObject
@@ -38,6 +40,10 @@ public:
     Q_INVOKABLE QString escapeString(const QString &string);
     Q_INVOKABLE QColor getUserColor(qreal hueF);
     Q_INVOKABLE QQuickItem *focusedWindowItem();
+    /**
+     * @brief Invokable version of PowerLevel::nameForLevel.
+     */
+    Q_INVOKABLE QString nameForLevel(PowerLevel::Level level);
 
 private:
     QmlUtils() = default;