Add software sources into submenu (Adding code from PR #382) #104

Job	Run time
build / build (lmde6, linuxmintd/lmde6-amd64, LMDE 6, false) / LMDE 6	1m 39s
build / build (mint22, linuxmintd/mint22-amd64, Mint 22, true) / Mint 22	1m 51s
	3m 30s

Provide feedback