[UNTESTED] Frontend.XF: added the side menu & settings page #2777

Job	Run time
linux-github--dotnet-and-newmono	8m 10s
linux-vanilla--stockdotnet6-and-newmono	6m 20s
linux-github--dotnet-and-mono	4m 21s
linux-vanilla--newmono-only	10m 4s
linux-vanilla--stockdotnet6-and-stockmono	9m 6s
linux-vanilla--stockdotnet6-only	5m 33s
linux-vanilla--stockmono-only	6m 8s
macOS--dotnet6-and-mono	13m 55s
macOS--dotnet6-only	5m 53s
macOS--mono-only	17m 32s
windows--dotnet6-and-legacyFramework	7m 27s
windows--dotnet6-only	9m 6s
windows--legacyFramework-only	15m 2s
conventions	1m 10s
snap_pkg	10m 54s
	2h 10m 41s

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