Extension data is loaded multiple times when browsing the extension details page

[netomi]

The fix applied in #1756 is incomplete, when browsing to an extension page, data is still loaded multiple times.

Furthermore, changing tabs always reload data even though it does not need to be loaded.

We need to optimize the extension detail page to only data that is needed.

[netomi]

could you please take a look @gnugomez ?

[gnugomez]

@netomi I'll take a look