Cinnamon-settings: Add touchpad tab to mouse panel
Cinnamon-settings: Add ability to custom size a panel - some panels
have immediate children that are scrolled windows, so we can't get a
useable preferred height from them for resizing purposes.  In that case
we can set a specific height to size the window to, that gets rid of most
of the blank space on that particular panel.
Cinnamon-settings: Add a test button for double click
Cinnamon-settings: Make sliders look better by aligning them in grids
Don't indent the test button in mouse panel, doesn't look right
Merge pull request #1940 from mtwebster/touchpad

Cinnamon settings: Add touchpad settings to the mouse panel