Various Bugfixes and cleanups

* remove debug statements from SmDirWatcher
* Don't crash on parentDir when current Dir is already deleted
* Fix PicFilesModel MappingQuery. It needlessly referenced the table
pics in FROM causing an expensive full table scan!
* Fix findRecursive in PicFilesModel: Stupid typo!
* Give SmDirWatcher a separate DB-Connection. One Thread, one Connection
* Remove several includes

This should have been 6 commits, but that's how debugging works :(

1 files changed, 10 insertions, 3 deletions

diff --git a/filesystemwidget.cpp b/filesystemwidget.cpp
index 779db2e..60c2d78 100644
--- a/filesystemwidget.cpp
+++ b/filesystemwidget.cpp
@@ -227,11 +227,18 @@ void FilesystemWidget::fileViewActivated(const QModelIndex &idx){
 
 void FilesystemWidget::parentDir(){
 	QModelIndex idx = mDirView->currentIndex();
+    QModelIndex prev = idx.sibling(idx.row() - 1, idx.column());
+    QString pName;
+    if(prev.isValid()){
+        pName = idx.data().toString();
+    }
+    QString sel = idx.data().toString();
 	if(idx.parent().isValid()){
 		mDirView->setCurrentIndex(idx.parent());
-	}
-    QString sel = idx.data().toString();
-    emit upSelected(sel);
+    }
+    if(!pName.isEmpty()){
+        emit upSelected(sel);
+    }
 }
 
 void FilesystemWidget::goBack(){