Revise text of "Open Playlist" button and description on dialog (#703)

- Change "Import" to "Open" to match desktop edition
  That's a point I hadn't noticed before :(
- Revise the description of Kugou playlist
  Related: lyswhut/lx-music-desktop#2246

src/lang/en-us.json

@@ -386,9 +386,9 @@
   "songlist_hot": "Top",
   "songlist_hot_collect": "Top Collect",
   "songlist_new": "Latest",
-  "songlist_open": "Import",
+  "songlist_open": "Open",
   "songlist_open_input_placeholder": "Enter a playlist link/ID",
-  "songlist_open_input_tip": "1. Cross-service playlists are not supported. Please confirm whether the playlist to be opened corresponds to the current chosen service\n2. If you encounter a playlist link that cannot be opened. Please send us your feedback\n3. Unable to open Kugou playlist with playlist ID, but support to open it with Kugou code",
+  "songlist_open_input_tip": "1. Cross-service playlists are not supported. Please confirm whether the playlist to be opened corresponds to the current chosen service\n2. If you encounter a playlist link that cannot be opened. Please send us your feedback\n3. Unable to open Kugou playlist with playlist ID or link from lite edition, but support to open it with Kugou code or link from main edition",
   "songlist_recommend": "Recommend",
   "songlist_rise": "Rise",
   "songlist_tag_default": "Default",

src/lang/zh-cn.json

@@ -386,9 +386,9 @@
   "songlist_hot": "最热",
   "songlist_hot_collect": "热藏",
   "songlist_new": "最新",
-  "songlist_open": "导入",
+  "songlist_open": "打开",
   "songlist_open_input_placeholder": "输入歌单链接或歌单 ID",
-  "songlist_open_input_tip": "1. 不支持跨源打开歌单，请确认要打开的歌单与当前选择的歌单来源是否对应\n2. 若遇到无法打开的歌单链接，欢迎反馈\n3. 不支持用歌单 ID 打开酷狗源歌单，但支持用酷狗码打开",
+  "songlist_open_input_tip": "1. 不支持跨源打开歌单，请确认要打开的歌单与当前选择的歌单来源是否对应\n2. 若遇到无法打开的歌单链接，欢迎反馈\n3. 酷狗源歌单不支持用歌单 ID 或概念版链接打开，但支持用普通版链接或酷狗码打开",
   "songlist_recommend": "推荐",
   "songlist_rise": "飙升",
   "songlist_tag_default": "默认",

src/lang/zh-tw.json

@@ -386,9 +386,9 @@
   "songlist_hot": "最熱",
   "songlist_hot_collect": "熱藏",
   "songlist_new": "最新",
-  "songlist_open": "匯入",
+  "songlist_open": "開啟",
   "songlist_open_input_placeholder": "輸入歌單連結或歌單 ID",
-  "songlist_open_input_tip": "1. 不支援跨平台開啟歌單，請確認要開啟的歌單與目前歌單的來源平台是否對應\n2. 若遇到無法開啟的歌單連結，歡迎回報\n3. 不支援用歌單 ID 開啟酷狗音樂歌單，但支援用酷狗碼開啟",
+  "songlist_open_input_tip": "1. 不支援跨平台開啟歌單，請確認要開啟的歌單與目前歌單的來源平台是否對應\n2. 若遇到無法開啟的歌單連結，歡迎回報\n3. 酷狗音樂歌單不支援用歌單 ID 與概念版連結開啟，但支援用普通版連結與酷狗碼開啟",
   "songlist_recommend": "推薦",
   "songlist_rise": "飆升",
   "songlist_tag_default": "預設",