[TYPO3-v4] 4.4 skin: EM load / unload icons

[Xavier Perseguers]

> The "problem" with the current icons in the EM that the '-' overlay (red
> circle with white bar) attracts all attention. The green brick is not
> very 'visible' compared to the red '-' overlay.
>
> The green and grey bricks try to convey the install status of the
> extension, but the colours are too similar.
>
> The total result is that it seems like the '-' overlay tries to tell the
> status (hidden, no access, ...) and does not show the action. The fact
> that the '-' overlay is used for both 'hidden' status and 'delete'
> actions makes it even more confusing. (See also my long rant earlier in
> this thread)

Of course but there's a major difference between a "-" sign alone or on 
a red disk background ;-)

(-) aka minus-on-red-disk means hidden, forbidden, etc.
-   aka minus alone usually means "remove"