feat: improve visualization of tags

Previously tags where very much focused on color coding email and less about
adding additional information. They were also visualized in different ways in
different locations.

This commit gets rid of all "Color-coding" references, aligns visualization of
the tags across the whole project and tries to improve user experience of using
tags in general.

A search box is shown in the tagging control so the user can quickly search for
a tag if they have a huge (more than 10) amount of tags.

locales/fa/common.json

@@ -325,13 +325,13 @@
     "view_contact": "مشاهده مخاطب",
     "message_details": "جزئیات پیام",
     "more_reply_options": "گزینه‌های بیشتر پاسخ",
-    "set_color": "تنظیم برچسب",
+    "set_tag": "تنظیم برچسب",
     "tag": "برچسب",
     "more_actions": "عملیات بیشتر",
     "previous": "قبلی",
     "next": "بعدی",
     "move_to": "انتقال به...",
-    "remove_color": "حذف برچسب",
+    "remove_tag": "حذف برچسب",
     "more_count": "+{count} بیشتر",
     "characters_count": "{count} کاراکتر",
     "quick_reply_placeholder": "پاسخ سریع بنویسید...",
@@ -425,17 +425,6 @@
       "message_id": "شناسه پیام",
       "list_info": "اطلاعات لیست"
     },
-    "color_tag": {
-      "title": "برچسب رنگی",
-      "red": "قرمز",
-      "orange": "نارنجی",
-      "yellow": "زرد",
-      "green": "سبز",
-      "blue": "آبی",
-      "purple": "بنفش",
-      "pink": "صورتی",
-      "none": "هیچکدام"
-    },
     "tooltips": {
       "reply": "پاسخ (r)",
       "reply_all": "پاسخ به همه (a)",
@@ -2033,8 +2022,7 @@
     "delete": "حذف",
     "mark_as_spam": "گزارش هرزنامه",
     "not_spam": "هرزنامه نیست",
-    "color_tag": "برچسب",
-    "remove_color": "حذف برچسب",
+    "tag": "برچسب",
     "items_selected": "{count} ایمیل انتخاب شده",
     "edit_draft": "ویرایش پیش‌نویس",
     "cancel_scheduled_send": "لغو ارسال",