wxGUI/timeline: don't use semitransparency

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@73020 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/timeline/frame.py

@@ -47,7 +47,7 @@ from core.gcmd import GError, GException, RunCommand
 from gui_core import gselect
 from core import globalvar
 
-ALPHA = 0.5
+ALPHA = 1
 COLORS = ['b', 'g', 'r', 'c', 'm', 'y', 'k']