We are currently running Ext 2.2.1.
We want to upgrade to the latest 3.x branch (currently 3.2.1).
To fit Ext 2.2.1 to our visual requirements we “themed” the CSS file quite a bit (~150 changes).
Looking at the 3.2.1 CSS, we see a very large amount of changes in comparison to 2.2.1 (breaking to structure/visual, changes in specific widgets, etc).
This makes it very hard for us to upgrade our Ext version, as it will require us to re-theme the new CSS in new and different ways.
Has anyone else faced this issue?
Can you please share your thoughts and experiences?
How fundamentally different are the CSSs?
How long did the upgrade process take (for what size of an application)?
Was it possible to receive assistance (through Support or other) from the company?