In other dialogs, it is not a revert to how it was before opening the
dialog, but a reset to default settings.
To just revert to dialog opening values, we can just use "Cancel" and
reopen the dialog (a bit cumbersome, but not something done often
anyway).
Currently what "Reset" does is to set back the device mode and any
customized axe curve. It doesn't touch customized keys, but these will
disappear anyway in a further commit.
Rather than the "Save" and "Close" buttons which were very weird, if not
misleading. When Aryeom was giving a course to students, several thought
the buttons were broken because "nothing happened" when clicking "Save".
So instead, "OK" will just save and exit (equivalent to click "Save"
then "Close" on old GUI) as it is the common usage and should be doable
in a single click.
"Cancel" closes while resetting to how the settings were before opening
the dialog.
Finally "Reset" just reset the settings to how they were before opening,
without closing the dialog.
This also makes the buttons look/behave like the ones on Preferences,
which is nice consistency-wise too.
...to the Configure Keyboard Shortcuts dialog
Add the button, based on an old patch from Sven Neumann, and make the
buttons in the keyboard shortcuts and input devices dialogs look and
behave the same.
Nobody has them anymore, and they are deprecated in GTK+ 3.x. This
also fixes all conflicting mnemonics except those I missed, but we can
fix them now.
because the packing options are different for GtkH/VBox and GtkBox
itself which is now instantiable. Instead, always use
gtk_box_pack_start() and specify expanding explicitely.
Jehan