Color theme setting in space administration does not reflect correctly the activated theme at wiki level

After XAADMINISTRATION-132 we can now change the Color Theme for a specific space.

The problem is the initial state of the select that allows this change.
If a color theme is not specified for a space, the space relies on the wiki theme. This is not displayed accordingly in the UI.

If no theme is specified for the space, the select displays "Bordo" theme, instead of "Inherit" or the name of the theme selected at wiki level.

Fix: in wiki if I activate "ThemeWiki" mark in the spaces select that this theme is activated.