Description of problem:
1. seelcted .desktop file for editing. 
2. Click on "categories"
3. Double clicked on "other" in the "category name" column. 
4. Menulibre crashes

reproducible every time on my system

Version-Release number of selected component:
menulibre-2.1.2-1.fc23

Additional info:
reporter:       libreport-2.6.3
backtrace_rating: 4
cmdline:        /usr/bin/python3 /usr/bin/menulibre
crash_function: update_menu_sensitivity
executable:     /usr/bin/python3.4
global_pid:     20233
kernel:         4.2.8-300.fc23.x86_64
runlevel:       N 5
type:           CCpp
uid:            1001

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 update_menu_sensitivity at gtkcombobox.c:2114
 #2 gtk_combo_box_menu_popup at gtkcombobox.c:2136
 #3 gtk_combo_box_popup_for_device at gtkcombobox.c:2285
 #4 _g_closure_invoke_va at gclosure.c:864
 #7 popup_idle at gtkcombobox.c:4536
 #12 g_main_context_iteration at gmain.c:3901
 #13 g_application_run at gapplication.c:2311
 #14 ffi_call_unix64 at ../src/x86/unix64.S:76
 #15 ffi_call at ../src/x86/ffi64.c:525
 #16 pygi_invoke_c_callable at pygi-invoke.c:645