[ocrfeeder] Fix OCR engine list and set Tesseract as default engine

[Joaquim Rocha <jrocha src gnome org>]

commit ea6e84d1d8cd27ac6016dc3a29a61e829f1c20c9
Author: scx <scx mail gmail com>
Date:   Sun Jan 27 16:34:39 2019 +0100

    Fix OCR engine list and set Tesseract as default engine

 src/ocrfeeder/feeder/ocrEngines.py      | 4 ++--
 src/ocrfeeder/studio/widgetPresenter.py | 2 +-
 src/ocrfeeder/util/configuration.py     | 4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/src/ocrfeeder/feeder/ocrEngines.py b/src/ocrfeeder/feeder/ocrEngines.py
index c43c8fc..0bbf118 100644
--- a/src/ocrfeeder/feeder/ocrEngines.py
+++ b/src/ocrfeeder/feeder/ocrEngines.py
@@ -212,7 +212,7 @@ class OcrEnginesManager:
         if not len(self.ocr_engines):
             debug("Warning: no engines found!")
         elif not favorite_engine_exists:
-            self.configuration_manager.favorite_engine = self.ocr_engines[0][0].name
+            self.configuration_manager.favorite_engine = self.ocr_engines[-1][0].name
         engines_needing_update = {'auto': [],
                                   'manual': []}
         for engine, path in self.ocr_engines:
@@ -261,7 +261,7 @@ class OcrEnginesManager:
         return engine
 
     def getXmlFilesInFolder(self, folder):
-        return [os.path.join(folder, file) for file in os.listdir(folder) if file.endswith('.xml')]
+        return [os.path.join(folder, file) for file in sorted(os.listdir(folder)) if file.endswith('.xml')]
 
     def newEngine(self, name, engine_path, arguments,
                   image_format, failure_string, languages,
diff --git a/src/ocrfeeder/studio/widgetPresenter.py b/src/ocrfeeder/studio/widgetPresenter.py
index 864b207..9e273bf 100644
--- a/src/ocrfeeder/studio/widgetPresenter.py
+++ b/src/ocrfeeder/studio/widgetPresenter.py
@@ -1435,7 +1435,7 @@ class PreferencesDialog(Gtk.Dialog):
         try:
             index = [engine.name for engine, path in 
self.ocr_engines].index(self.configuration_manager.favorite_engine)
         except ValueError:
-            index = 0
+            index = 0 if len(self.ocr_engines) == 0 else len(self.ocr_engines) - 1
         self.engines_combo.set_active(index)
         engines_box = Gtk.HBox(spacing = 10)
         label = Gtk.Label(_("Favorite _engine:"))
diff --git a/src/ocrfeeder/util/configuration.py b/src/ocrfeeder/util/configuration.py
index 6feb9a1..26c33e5 100644
--- a/src/ocrfeeder/util/configuration.py
+++ b/src/ocrfeeder/util/configuration.py
@@ -114,7 +114,7 @@ class ConfigurationManager(object):
                 UNPAPER_USE_BLACK_FILTER: True,
                 UNPAPER_NOISE_FILTER_INTENSITY: 'auto',
                 UNPAPER_GRAY_FILTER_SIZE: 'auto',
-                FAVORITE_ENGINE: 'ocrad',
+                FAVORITE_ENGINE: 'tesseract',
                 IMPROVE_COLUMN_DETECTION: True,
                 COLUMN_MIN_WIDTH: 'auto',
                 CLEAN_TEXT: True,
@@ -172,7 +172,7 @@ class ConfigurationManager(object):
                             language_argument = language_argument,
                             version = version)
             existing_engines.append(engine)
-        return existing_engines
+        return sorted(existing_engines, key=lambda x: x.name, reverse=False)
 
     def setConf(self, conf_key, value):
         ConfigurationManager.conf[conf_key] = value