Only show I2P bookmarks in the I2P browser

At the moment we have an I2P bookmark folder in the browser that deals both with Tor and I2P. Once we have the I2P browser, it should be moved into its profile.

Feature Branch: kytv:feature/7725-i2p-browser

Related issues

Blocked by #7725 (closed)

Original created by @anonym on 7948 (Redmine)

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