Fixed incorrect formatting of numbers and plural words (#6696)

* Fixed incorrect formatting of numbers and plural words

* Removed unused i18n strings

* Fixed eslint errors

webapp/i18n/en.json

@@ -1269,7 +1269,7 @@
   "delete_post.del": "Delete",
   "delete_post.post": "Post",
   "delete_post.question": "Are you sure you want to delete this {term}?",
-  "delete_post.warning": "This post has {count} comment(s) on it.",
+  "delete_post.warning": "This post has {count, number} {count, plural, one {comment} other {comments}} on it.",
   "edit_channel_header.editHeader": "Edit the Channel Header...",
   "edit_channel_header.previewHeader": "Edit header",
   "edit_channel_header_modal.cancel": "Cancel",
@@ -1350,16 +1350,13 @@
   "file_upload.disabled": "File attachments are disabled.",
   "file_upload.fileAbove": "File above {max}MB cannot be uploaded: {filename}",
   "file_upload.filesAbove": "Files above {max}MB cannot be uploaded: {filenames}",
-  "file_upload.limited": "Uploads limited to {count} files maximum. Please use additional posts for more files.",
+  "file_upload.limited": "Uploads limited to {count, number} files maximum. Please use additional posts for more files.",
   "file_upload.pasted": "Image Pasted at ",
-  "filtered_channels_list.count": "{count} {count, plural, =0 {0 channels} one {channel} other {channels}}",
-  "filtered_channels_list.countTotal": "{count} {count, plural, =0 {0 channels} one {channel} other {channels}} of {total} total",
   "filtered_channels_list.search": "Search channels",
   "filtered_user_list.any_team": "All Users",
-  "filtered_user_list.count": "{count} {count, plural, =0 {0 members} one {member} other {members}}",
-  "filtered_user_list.countPage": "{startCount, number} - {endCount, number} {count, plural, =0 {0 members} one {member} other {members}}",
-  "filtered_user_list.countTotal": "{count} {count, plural, =0 {0 members} one {member} other {members}} of {total} total",
-  "filtered_user_list.countTotalPage": "{startCount, number} - {endCount, number} {count, plural, =0 {0 members} one {member} other {members}} of {total} total",
+  "filtered_user_list.count": "{count, number} {count, plural, one {member} other {members}}",
+  "filtered_user_list.countTotal": "{count, number} {count, plural, one {member} other {members}} of {total, number} total",
+  "filtered_user_list.countTotalPage": "{startCount, number} - {endCount, number} {count, plural, one {member} other {members}} of {total, number} total",
   "filtered_user_list.member": "Member",
   "filtered_user_list.next": "Next",
   "filtered_user_list.prev": "Previous",
@@ -1803,7 +1800,7 @@
   "multiselect.add": "Add",
   "multiselect.go": "Go",
   "multiselect.instructions": "Use up/down arrows to navigate and enter to select",
-  "multiselect.numPeopleRemaining": "You can add {num, number} more {num, plural, =0 {people} one {person} other {people}}. ",
+  "multiselect.numPeopleRemaining": "You can add {num, number} more {num, plural, one {person} other {people}}. ",
   "multiselect.numRemaining": "You can add {num, number} more",
   "multiselect.placeholder": "Search and add members",
   "navbar.addMembers": "Add Members",
@@ -1869,8 +1866,7 @@
   "post_attachment.more": "Show more...",
   "post_body.commentedOn": "Commented on {name}{apostrophe} message: ",
   "post_body.deleted": "(message deleted)",
-  "post_body.plusMore": " plus {count} other files",
-  "post_body.plusOne": " plus 1 other file",
+  "post_body.plusMore": " plus {count, number} other {count, plural, one {file} other {files}}",
   "post_delete.notPosted": "Comment could not be posted",
   "post_delete.okay": "Okay",
   "post_delete.someone": "Someone deleted the message on which you tried to post a comment.",
@@ -2074,8 +2070,8 @@
   "suggestion.search.private": "Private Channels",
   "suggestion.search.public": "Public Channels",
   "system_users_list.count": "{count, number} {count, plural, one {user} other {users}}",
-  "system_users_list.countPage": "{startCount, number} - {endCount, number} {count, plural, one {user} other {users}} of {total} total",
-  "system_users_list.countSearch": "{count, number} {count, plural, one {user} other {users}} of {total} total",
+  "system_users_list.countPage": "{startCount, number} - {endCount, number} {count, plural, one {user} other {users}} of {total, number} total",
+  "system_users_list.countSearch": "{count, number} {count, plural, one {user} other {users}} of {total, number} total",
   "team_export_tab.download": "download",
   "team_export_tab.export": "Export",
   "team_export_tab.exportTeam": "Export your team",
@@ -2444,7 +2440,7 @@
   "user_profile.webrtc.unavailable": "New call unavailable until your existing call ends",
   "view_image.loading": "Loading ",
   "view_image_popover.download": "Download",
-  "view_image_popover.file": "File {count} of {total}",
+  "view_image_popover.file": "File {count, number} of {total, number}",
   "view_image_popover.publicLink": "Get Public Link",
   "web.footer.about": "About",
   "web.footer.help": "Help",