[ListItems] Apply workaround only for Fusion style

It actually breaks other styles ...
Fixes 2105b48ca4

src/lib/other/iconchooser.cpp

@@ -17,6 +17,8 @@
 * ============================================================ */
 #include "iconchooser.h"
 #include "ui_iconchooser.h"
+#include "mainapplication.h"
+#include "proxystyle.h"
 #include "qztools.h"
 
 #include <QFileDialog>
@@ -115,8 +117,12 @@ void IconChooserDelegate::paint(QPainter* painter, const QStyleOptionViewItem &o
     const QStyle* style = w ? w->style() : QApplication::style();
 
     // Draw background
-    // Use PanelItemViewRow, because of Qt5's Fusion style incorrectly renders PanelItemViewItem
-    style->drawPrimitive(QStyle::PE_PanelItemViewRow, &opt, painter, w);
+    if (mApp->proxyStyle()->name() == QLatin1String("fusion")) {
+        style->drawPrimitive(QStyle::PE_PanelItemViewRow, &opt, painter, w);
+    }
+    else {
+        style->drawPrimitive(QStyle::PE_PanelItemViewItem, &opt, painter, w);
+    }
 
     // Draw icon
     QIcon icon = index.data(Qt::DecorationRole).value<QIcon>();

src/lib/tools/listitemdelegate.cpp

@@ -16,6 +16,8 @@
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * ============================================================ */
 #include "listitemdelegate.h"
+#include "mainapplication.h"
+#include "proxystyle.h"
 
 #include <QApplication>
 #include <QPainter>
@@ -65,7 +67,12 @@ void ListItemDelegate::paint(QPainter* painter, const QStyleOptionViewItem &opti
 
     // Draw background
     // Use PanelItemViewRow, because of Qt5's Fusion style incorrectly renders PanelItemViewItem
-    style->drawPrimitive(QStyle::PE_PanelItemViewRow, &opt, painter);
+    if (mApp->proxyStyle()->name() == QLatin1String("fusion")) {
+        style->drawPrimitive(QStyle::PE_PanelItemViewRow, &opt, painter, w);
+    }
+    else {
+        style->drawPrimitive(QStyle::PE_PanelItemViewItem, &opt, painter, w);
+    }
 
     // Draw icon
     QRect iconRect(opt.rect.left() + (opt.rect.width() - m_iconSize) / 2, topPosition, m_iconSize, m_iconSize);