[Cleanup] QTimer::start() restarts timer if it is already running

src/lib/bookmarks/bookmarksmodel.cpp

@@ -322,7 +322,6 @@ void BookmarksFilterModel::setFilterFixedString(const QString &pattern)
 {
     m_pattern = pattern;
 
-    m_filterTimer->stop();
     m_filterTimer->start();
 }
 

src/lib/bookmarks/bookmarkstoolbar.cpp

@@ -109,7 +109,6 @@ void BookmarksToolbar::refresh()
 
 void BookmarksToolbar::bookmarksChanged()
 {
-    m_updateTimer->stop();
     m_updateTimer->start();
 }
 

src/lib/desktopnotifications/desktopnotification.cpp

@@ -51,7 +51,6 @@ void DesktopNotification::show()
     ui->text->setText(m_text);
 
     if (!m_settingPosition) {
-        m_timer->stop();
         m_timer->setInterval(m_timeout);
         m_timer->start();
     }

src/lib/history/historymodel.cpp

@@ -529,7 +529,6 @@ void HistoryFilterModel::setFilterFixedString(const QString &pattern)
 {
     m_pattern = pattern;
 
-    m_filterTimer->stop();
     m_filterTimer->start();
 }