i18n: add theme selection options in English and Chinese locales

Author: monkeyWie

src/app/i18n/locales/en.json

@@ -173,7 +173,9 @@
 	"theme": {
 		"auto": "Auto",
 		"light": "Light",
-		"dark": "Dark"
+		"dark": "Dark",
+		"selectTheme": "Select Theme",
+		"selectThemeColor": "Select Theme Color"
 	},
 	"language": {
 		"label": "English",

src/app/i18n/locales/zh.json

@@ -173,7 +173,9 @@
 	"theme": {
 		"auto": "自动",
 		"light": "浅色",
-		"dark": "深色"
+		"dark": "深色",
+		"selectTheme": "选择主题",
+		"selectThemeColor": "选择主题色"
 	},
 	"language": {
 		"label": "简体中文",