g.gui.timeline: add keywords

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@57497 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/timeline/g.gui.timeline.py

@@ -21,6 +21,9 @@
 
 #%module
 #% description: Allows to compare temporal datasets by displaying their temporal extents in a plot.
+#% keywords: general
+#% keywords: GUI
+#% keywords: temporal
 #%end
 #%option G_OPT_STDS_INPUTS
 #% required: no