Update config backup path mappings to be `config/...`

[alichtman]

All of these destination paths should be config/... for parity with the plist paths, and for clarity in the config. It should also reduce code complexity in the backup and reinstall files.

		"config_path_to_dest_map": {
			"Library/Application Support/Sublime Text 2/Packages/User/": "sublime_2",
			"Library/Application Support/Sublime Text 3/Packages/User/": "sublime_3",
			"Library/Preferences/IntelliJIdea2018.2/"                  : "intellijidea_2018.2",
			"Library/Preferences/PyCharm2018.2/"                       : "pycharm_2018.2",
			"Library/Preferences/CLion2018.2/"                         : "clion_2018.2",
			"Library/Preferences/PhpStorm2018.2"                       : "phpstorm_2018.2",
			".atom/"                                                   : "atom",
		},