1.9 docs: Fix structure

[NigelBreslaw]

Layouts were duplicated under keyboard input and missing common properties.

Keyboard input was missing focusscope and textinput

[NigelBreslaw]

Whoops. Out of interest why is 'col' one of the rare exceptions to use a short name instead of 'column' and why isn't it 'row-span' instead of 'rowspan'?

[tronical]

Unfortunately I don't have a good reason :-). I like column. We could also go all CSS and have

`column-start` / `column-end` / `row-start` / `row-end`

and let

`column: X` be short-hand for `column-start: X; column-end: X;`