6.5r2 Cartaro Quickstart review: text improvements suggestions

[jsanchez]

1.- 'Choose |osgeolive-Other-Start Cartaro| from menu'

Should be: 'Applications | Other | Start Cartaro'

2.- 'Choose Styles on the right side'

Should be better: 'Choose Styles on the right side and click on add'

3.- At the end of point 'Configure Open Layers' and 'add content' issues I miss that user have to click on 'save' buttom.

[kalxas]

(In [9723]) fixed #1076

[phaf]

Thanks for reviewing and your suggestions!