[keys] Use keysDisp attribute in KeysViewer.
[keys] Assign finer classes to the key list. Do not group by type.
[keys] Show the command type groups visually, but not structurally.
[keys] Implement command family in appendCommand()
[keys] Display key family in KeysViewer. + refactor.
[keys] Fix the case when two families come consecutively.
[keys] Fix the case where a family is the last entry of a type.
Merge branch 'new-keys-family' into new-keys
[keys] Move keysViewer inside VimFSM.
[keys] Update keys in onafterevent.
[keys] Add partial key support
[keys] Move showKeys() and showPartialKeys() into onafterevent().
Merge branch 'new-keys' into develop