Remove current partition's mountpoint from used list.

This means that when we edit a partition, we don't consider
its current mountpoint invalid because it is already in-use.

We need to do this for both "edit existing partition" and
"edit a partition that we are still creating".

src/modules/partition/gui/EditExistingPartitionDialog.cpp

@@ -62,8 +62,6 @@ EditExistingPartitionDialog::EditExistingPartitionDialog( Device* device, Partit
     mountPoints.sort();
     m_ui->mountPointComboBox->addItems( mountPoints );
 
-    m_usedMountPoints.removeOne( PartitionInfo::mountPoint( partition ) );
-
     QColor color = ColorUtils::colorForPartition( m_partition );
     m_partitionSizeController->init( m_device, m_partition, color );
     m_partitionSizeController->setSpinBox( m_ui->sizeSpinBox );

src/modules/partition/gui/PartitionPage.cpp

@@ -266,7 +266,10 @@ PartitionPage::onPartitionViewActivated()
 void
 PartitionPage::updatePartitionToCreate( Device* device, Partition* partition )
 {
-    QPointer<CreatePartitionDialog> dlg = new CreatePartitionDialog( device, partition->parent(), getCurrentUsedMountpoints(), this );
+    QStringList mountPoints = getCurrentUsedMountpoints();
+    mountPoints.removeOne( PartitionInfo::mountPoint( partition ) );
+
+    QPointer<CreatePartitionDialog> dlg = new CreatePartitionDialog( device, partition->parent(), mountPoints, this );
     dlg->initFromPartitionToCreate( partition );
     if ( dlg->exec() == QDialog::Accepted )
     {
@@ -280,7 +283,10 @@ PartitionPage::updatePartitionToCreate( Device* device, Partition* partition )
 void
 PartitionPage::editExistingPartition( Device* device, Partition* partition )
 {
-    QPointer<EditExistingPartitionDialog> dlg = new EditExistingPartitionDialog( device, partition, getCurrentUsedMountpoints(), this );
+    QStringList mountPoints = getCurrentUsedMountpoints();
+    mountPoints.removeOne( PartitionInfo::mountPoint( partition ) );
+
+    QPointer<EditExistingPartitionDialog> dlg = new EditExistingPartitionDialog( device, partition, mountPoints, this );
     if ( dlg->exec() == QDialog::Accepted )
         dlg->applyChanges( m_core );
     delete dlg;