[FIX] Demo Kit: API Reference topic URL's generation fixed
[FIX] Demo Kit: API Reference topic URL's generation fixed

The problem:
Topic URL's are not pre-processed properly which results in invalid
URL's generated

The root cause:
Recently encoding was introduced to URL's prior to pre-processing and
the pre-process relies on certain characters in this case ":" so the
URL can be processed correctly

The solution:
Restore the ":" character after encoding and prior to the pre-process
of the link. The ":" character is removed from the resulting URL so
there is no need to encode it again in the end

Change-Id: I2e68714a1c2056386598f2da8d79c5dce92d4da4
BCP: 1880609747

SAP/openui5,SAP/openui5,SAP/openui5,SAP/openui5