debug-viewer: cleanup imports in plugins

Don't use * imports. Don't rely on package level imports.

debug-viewer/GstDebugViewer/Plugins/FileProperties.py

@@ -19,8 +19,11 @@
 
 """GStreamer Debug Viewer file properties plugin."""
 
-from GstDebugViewer.Plugins import *
 import logging
+
+from GstDebugViewer.Plugins import FeatureBase, PluginBase
+
+from gettext import gettext as _
 from gi.repository import Gtk
 
 class FilePropertiesSentinel (object):

debug-viewer/GstDebugViewer/Plugins/FindBar.py

@@ -22,8 +22,9 @@
 import logging
 
 from GstDebugViewer import Common, Data, GUI
-from GstDebugViewer.Plugins import *
+from GstDebugViewer.Plugins import FeatureBase, PluginBase, _N
 
+from gettext import gettext as _
 from gi.repository import GObject, GLib
 from gi.repository import Gtk
 

debug-viewer/GstDebugViewer/Plugins/Timeline.py

@@ -23,8 +23,9 @@ import logging
 
 from GstDebugViewer import Common, Data
 from GstDebugViewer.GUI.colors import LevelColorThemeTango, ThreadColorThemeTango
-from GstDebugViewer.Plugins import *
+from GstDebugViewer.Plugins import FeatureBase, PluginBase
 
+from gettext import gettext as _
 from gi.repository import GObject
 from gi.repository import Gtk
 from gi.repository import Gdk
@@ -356,7 +357,7 @@ class VerticalTimelineWidget (Gtk.DrawingArea):
         self.queue_draw ()
 
         return False
-   
+
     def do_get_preferred_width (self):
 
         return 64, 64 # FIXME
@@ -533,7 +534,7 @@ class TimelineWidget (Gtk.DrawingArea):
         ctx.set_source_surface (self.__offscreen)
         ctx.rectangle (rect.x, rect.y, rect.width, rect.height)
         ctx.paint ()
-        
+
         self.__draw_position (ctx, clip = rect)
 
     def update (self, model):

debug-viewer/GstDebugViewer/Plugins/__init__.py

@@ -22,7 +22,6 @@
 __all__ = ["_", "_N", "FeatureBase", "PluginBase"]
 
 import os.path
-from gettext import gettext as _
 
 def _N (s): return s