Fix error found by cppcheck

src/filter/filterimporter/filterimportergmail.h

@@ -24,7 +24,7 @@ namespace MailCommon {
 class MAILCOMMON_EXPORT FilterImporterGmail : public FilterImporterAbstract
 {
 public:
-    FilterImporterGmail(QFile *file);
+    explicit FilterImporterGmail(QFile *file);
     ~FilterImporterGmail();
     static QString defaultFiltersSettingsPath();
 private:

src/folder/foldertreewidget.cpp

@@ -402,13 +402,11 @@ bool FolderTreeWidget::eventFilter(QObject *o, QEvent *e)
             }
             applyFilter(d->filter);
             return false;
-            break;
         }
         case Qt::Key_Delete:
             d->filter.clear();
             applyFilter(d->filter);
             return false;
-            break;
         default:
         {
             const QString s = ke->text();