Fix automatic horizontal scrolling

Fix annoying bug where the table view scrolls horizontally to seemingly
random locations whenever the list was refreshed (i.e., doing anything
useful).

Also changed the horizontal scroll mode to by-pixel because it's a lot
nicer.

advancedbrowser/core.py

@@ -60,6 +60,12 @@ def __init__(self, browser):
             if 'noteFld' not in self.activeCols:
                 self.activeCols.append('noteFld')
 
+    def restoreSelection(self):
+        """Workaround for annoying horizontal re-scrolling bug in qt"""
+        origH = self.browser.form.tableView.horizontalScrollBar().value()
+        super(AdvancedDataModel, self).restoreSelection()
+        self.browser.form.tableView.horizontalScrollBar().setValue(origH)
+
     def columnData(self, index):
         # Try to handle built-in Anki column
         returned = self._columnData(self, index)
@@ -261,6 +267,11 @@ def __removeColumns(self):
             if type in self.model.activeCols:
                 self.toggleField(type)
 
+    def setupTable(self):
+        """Some customizations to the table view"""
+        super(AdvancedBrowser, self).setupTable()
+        self.form.tableView.setHorizontalScrollMode(QAbstractItemView.ScrollPerPixel)
+
     def setupColumns(self):
         """Build a list of candidate columns. We extend the internal
         self.columns list with our custom types."""