It's located in the file toolbars.cfg in the folder of the skin you're using.
for example:
Reload{
%ifplugin macros
ID_NAV_RELOAD|Reloa&ding
Reload this page. Right-click for more options.
%else
ID_NAV_RELOAD
Reload this page
%endif
mainbarhot.bmp[3]
mainbarcold.bmp[3]
mainbarcold.bmp[3]
}
The actions are on the second line after the name of the button
ID_NAV_RELOAD|Reloa&ding
The part before | is the left-click action, the part after the | ist the right-click button action
Just delete the right part:
ID_NAV_RELOAD
And this for all the concerned buttons.
A+
Mozilla/5.0 (x11; U; Linux x86_64; fr-FR; rv:38.0) Gecko/20100101 Ubuntu/12.04 K-Meleon/76.0
Web:
http://jujuland.pagesperso-orange.fr/
Mail : alain [dot] aupeix [at] wanadoo [dot] fr
Ubuntu 12.04 - Gramps 3.4.9 - Harbour 3.2.0 - Hwgui 2.20-3 - K-Meleon 76.0 rc