[TYPO3-core] RFC: #11117: Update extJs to 3.0 RC1

[Steffen Kamper]

Hi,

just for clearify, because some may say: i like the current pic more

Current situation:
* ext-all.css
* grey theme

grey theme is not complete, ext-all has complete default theme included. 
So if you use anything which isn't styled in grey, you see the fallback 
like in the grid

No situation is
* ext-all-notheme.css
* grey extended (merged) theme

Now theme is complete. It's easy now to style it in TYPO3 way because 
nothing is missing, no fallback to default needed, less css load at all.

Hope this clarifies what i'm talking about :)

vg Steffen