Fix help uri for applets
command: Add GTK3 support
timerapplet: Add GTK3 support
Fix invest-applet pop-up window
invest-applet: fixed chart and prefs window, added chart scale option

- combo boxes printed their content twice
- preferences dialog threw warning
- added plot scale option to charts window
- Replace GtkComboBox with GtkComboBoxText

Based on gnome commit 766c9e1711330ec2b7109aa39ddd43b6583a30d3
Authot: Enrico Minack <enrico-minack@gmx.de>
Url: https://git.gnome.org/browse/gnome-applets/commit/?id=766c9e1711330ec2b7109aa39ddd43b6583a30d3
invest-applet: Add more debug info to quotes.py.

Based on gnome's invest applet.
Don't explicitly set invisible_char but rely on the gtk+ default.

Gnome commit: 40eac4f023addf9d5c098e16942ab1e8db03d14e
Author: Kjartan Maraas <kmaraas@gnome.org>
Url: https://git.gnome.org/browse/gnome-applets/commit/?id=40eac4f023addf9d5c098e16942ab1e8db03d14e
invest-applet: downloaded quotes get cached

- this allows to show most recently retrieved quotes on next start up in case the system is offline by that time
Author: Enrico Minack <enrico-minack@gmx.de>
Gnome commit: 65212e8cd3a101e69fc9f7877450ab5198af9681
Url: https://git.gnome.org/browse/gnome-applets/commit/?id=65212e8cd3a101e69fc9f7877450ab5198af9681
invest-applet: ignore unknown stocks

Author: Enrico Minack <enrico-minack@gmx.de>
Commit: 9be66818e7b75df4db86b88154c7df47afda9a79
Url: https://git.gnome.org/browse/gnome-applets/commit/?id=9be66818e7b75df4db86b88154c7df47afda9a79
gnome-bug: http://bugzilla.gnome.org/show_bug.cgi?id=608842
invest-applet: Fix some naming bugs
Merge branch 'master' of https://github.com/mate-desktop/mate-applets