manual: add 'plot' keyword (#1087)

Relevant for https://grass.osgeo.org/grass79/manuals/keywords.html

display/d.profile/main.c

@@ -191,6 +191,7 @@ int main(int argc, char **argv)
     G_add_keyword(_("display"));
     G_add_keyword(_("profile"));
     G_add_keyword(_("raster"));
+    G_add_keyword(_("plot"));
     module->description = _("Plots profile of a transect.");
 
     /* set up command line */

gui/wxpython/docs/wxGUI.iscatt.html

@@ -3,7 +3,7 @@
 
 <h2>KEYWORDS</h2>
 
-<a href="display.html">display</a>, <a href="topic_GUI.html">GUI</a>, <a href="keywords.html#imagery">imagery</a>, <a href="keywords.html#scatter plot">scatter plot</a>
+<a href="display.html">display</a>, <a href="topic_GUI.html">GUI</a>, <a href="keywords.html#imagery">imagery</a>, <a href="keywords.html#scatterplot">scatterplot</a>, <a href="keywords.html#plot">plot</a>
 
 <h2>DESCRIPTION</h2>
 

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

@@ -24,6 +24,7 @@
 #% keyword: general
 #% keyword: GUI
 #% keyword: temporal
+#% keywords: plot
 #%end
 #%option G_OPT_STDS_INPUTS
 #% required: no

gui/wxpython/tplot/g.gui.tplot.py

@@ -25,6 +25,7 @@
 #% keywords: general
 #% keywords: GUI
 #% keywords: temporal
+#% keywords: plot
 #%end
 
 #%flag