Patch for composer label text edit erratic cursor, should not break ticket #5862 fix.

composerlabel_patch.diff

diff --git a/src/app/composer/qgscomposerlabelwidget.cpp b/src/app/composer/qgscomposerlabelwidget.cpp
index 69a42af..ac25c87 100644
--- a/src/app/composer/qgscomposerlabelwidget.cpp
+++ b/src/app/composer/qgscomposerlabelwidget.cpp
@@ -42,8 +42,10 @@ void QgsComposerLabelWidget::on_mTextEdit_textChanged()
   if ( mComposerLabel )
   {
     mComposerLabel->beginCommand( tr( "Label text changed" ), QgsComposerMergeCommand::ComposerLabelSetText );
+    mComposerLabel->blockSignals( true );
     mComposerLabel->setText( mTextEdit->toPlainText() );
     mComposerLabel->update();
+    mComposerLabel->blockSignals( false );
     mComposerLabel->endCommand();
   }
 }