align icons on the Manage layers toolbar (fix #15074) (#3232)

Author: alexbruy

src/app/qgisapp.cpp

@@ -2223,6 +2223,12 @@ void QgisApp::createToolBars()
   addDbLayerAction->setObjectName( "ActionAddDbLayer" );
   connect( bt, SIGNAL( triggered( QAction * ) ), this, SLOT( toolButtonActionTriggered( QAction * ) ) );
 
+  QLayout *layout = mLayerToolBar->layout();
+  for ( int i = 0; i < layout->count(); ++i )
+  {
+    layout->itemAt( i )->setAlignment( Qt::AlignLeft );
+  }
+
   //circular string digitize tool button
   QToolButton* tbAddCircularString = new QToolButton( mDigitizeToolBar );
   tbAddCircularString->setPopupMode( QToolButton::MenuButtonPopup );