Rename new default theme files (microsoft#183001)

* Rename new default theme files

* Update tests

Author: daviddossett

extensions/theme-defaults/package.json

@@ -21,9 +21,9 @@
       },
       {
         "id": "Default Dark Modern",
-        "label": "%darkPlusExperimentalColorThemeLabel%",
+        "label": "%darkModernThemeLabel%",
         "uiTheme": "vs-dark",
-        "path": "./themes/dark_plus_experimental.json"
+        "path": "./themes/dark_modern.json"
       },
       {
         "id": "Default Light+",
@@ -33,9 +33,9 @@
       },
       {
         "id": "Default Light Modern",
-        "label": "%lightPlusExperimentalColorThemeLabel%",
+        "label": "%lightModernThemeLabel%",
         "uiTheme": "vs",
-        "path": "./themes/light_plus_experimental.json"
+        "path": "./themes/light_modern.json"
       },
       {
         "id": "Visual Studio Dark",

extensions/theme-defaults/package.nls.json

@@ -2,9 +2,9 @@
 	"displayName": "Default Themes",
 	"description": "The default Visual Studio light and dark themes",
 	"darkPlusColorThemeLabel": "Dark+",
-	"darkPlusExperimentalColorThemeLabel": "Dark Modern",
+	"darkModernThemeLabel": "Dark Modern",
 	"lightPlusColorThemeLabel": "Light+",
-	"lightPlusExperimentalColorThemeLabel": "Light Modern",
+	"lightModernThemeLabel": "Light Modern",
 	"darkColorThemeLabel": "Dark (Visual Studio)",
 	"lightColorThemeLabel": "Light (Visual Studio)",
 	"hcColorThemeLabel": "Dark High Contrast",