Sync settings file extensions with INI package

This commit assigns only extensions, which are assigned to real INI syntax.

Support same set of extensions, regardless INI package is present or not.

Author: deathaxe

icons/icons.json

@@ -3062,16 +3062,27 @@
 		"syntaxes": [
 			{
 				"extensions": [
-					"fmt",
+					".buckconfig",
+					".coveragerc",
+					".flake8",
+					".flowconfig",
+					".hgrc",
+					".pycodestyle",
+					".pylintrc",
+					".style.yapf",
+					"avpreset",
 					"cfg",
-					"ini",
+					"conf",
+					"desktop",
+					"ffpreset",
 					"inf",
+					"ini",
+					"lektorproject",
 					"lng",
-					"pbk",
+					"pycodestyle",
+					"pylintrc",
 					"url",
-					"conf",
-					"config",
-					"buildozer.spec"
+					"vlcrc"
 				],
 				"name": "Plain Text (INI)",
 				"scope": "source.ini"