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/en/common.json

@@ -327,13 +327,15 @@
     "view_contact": "View contact",
     "message_details": "Message Details",
     "more_reply_options": "More reply options",
-    "set_color": "Set tag",
+    "set_tag": "Set tag",
     "tag": "Tag",
     "more_actions": "More actions",
     "previous": "Prev",
     "next": "Next",
     "move_to": "Move to...",
-    "remove_color": "Remove tag",
+    "remove_tag": "Remove tag",
+    "tag_filter_placeholder": "Filter tags",
+    "tag_no_matches": "No matching tags",
     "more_count": "+{count} more",
     "characters_count": "{count} characters",
     "quick_reply_placeholder": "Write a quick reply...",
@@ -427,17 +429,6 @@
       "message_id": "Message ID",
       "list_info": "List Information"
     },
-    "color_tag": {
-      "title": "Color Tag",
-      "red": "Red",
-      "orange": "Orange",
-      "yellow": "Yellow",
-      "green": "Green",
-      "blue": "Blue",
-      "purple": "Purple",
-      "pink": "Pink",
-      "none": "None"
-    },
     "tooltips": {
       "reply": "Reply (r)",
       "reply_all": "Reply All (a)",
@@ -1019,7 +1010,7 @@
     },
     "keywords": {
       "title": "Email Tags",
-      "description": "Define tags to organize your emails with colors. These are stored as JMAP keywords on the server.",
+      "description": "Define tags to organize your emails. These are stored as JMAP keywords on the server.",
       "add_keyword": "Add Tag",
       "label_field": "Display Name",
       "label_placeholder": "e.g. Work, Personal, Urgent",
@@ -2050,8 +2041,7 @@
     "delete": "Delete",
     "mark_as_spam": "Report spam",
     "not_spam": "Not spam",
-    "color_tag": "Tag",
-    "remove_color": "Remove tag",
+    "tag": "Tag",
     "items_selected": "{count} emails selected",
     "edit_draft": "Edit Draft",
     "cancel_scheduled_send": "Cancel send",