Fix #1498
cinnamon settings: fix problem with custom keybinding names and actions
not being updated when edited.
Merge pull request #1529 from mtwebster/kb-edit-custom

cinnamon settings: fix problem with custom keybinding names and actions
Merge pull request #1499 from leigh123linux/master

 Fix #1498, closes #1498
Don't reset GSettingsSpinButton's value when using tab to leave the input, closes #1548
Merge branch 'master' of https://github.com/linuxmint/Cinnamon