Maintenance: Improved translatable source strings.

app/assets/javascripts/app/controllers/_channel/email.coffee

@@ -142,7 +142,7 @@ class ChannelEmailAccountOverview extends App.Controller
     e.preventDefault()
     id   = $(e.target).closest('.action').data('id')
     new App.ControllerConfirm(
-      message: __('Sure?')
+      message: __('Are you sure?')
       callback: =>
         @ajax(
           id:   'email_delete'

app/assets/javascripts/app/controllers/_channel/facebook.coffee

@@ -95,7 +95,7 @@ class ChannelFacebook extends App.ControllerSubContent
     e.preventDefault()
     id   = $(e.target).closest('.action').data('id')
     new App.ControllerConfirm(
-      message: __('Sure?')
+      message: __('Are you sure?')
       callback: =>
         @ajax(
           id:   'facebook_delete'

app/assets/javascripts/app/controllers/_channel/google.coffee

@@ -145,7 +145,7 @@ class ChannelAccountOverview extends App.ControllerSubContent
     e.preventDefault()
     id   = $(e.target).closest('.action').data('id')
     new App.ControllerConfirm(
-      message: __('Sure?')
+      message: __('Are you sure?')
       callback: =>
         @ajax(
           id:   'google_delete'

app/assets/javascripts/app/controllers/_channel/microsoft365.coffee

@@ -136,7 +136,7 @@ class ChannelAccountOverview extends App.ControllerSubContent
     e.preventDefault()
     id   = $(e.target).closest('.action').data('id')
     new App.ControllerConfirm(
-      message: __('Sure?')
+      message: __('Are you sure?')
       callback: =>
         @ajax(
           id:   'microsoft365_delete'

app/assets/javascripts/app/controllers/_channel/telegram.coffee

@@ -63,7 +63,7 @@ class ChannelTelegram extends App.ControllerSubContent
     e.preventDefault()
     id   = $(e.target).closest('.action').data('id')
     new App.ControllerConfirm(
-      message: __('Sure?')
+      message: __('Are you sure?')
       callback: =>
         @ajax(
           id:   'telegram_delete'

app/assets/javascripts/app/controllers/_channel/twitter.coffee

@@ -102,7 +102,7 @@ class ChannelTwitter extends App.ControllerSubContent
     e.preventDefault()
     id   = $(e.target).closest('.action').data('id')
     new App.ControllerConfirm(
-      message: __('Sure?')
+      message: __('Are you sure?')
       callback: =>
         @ajax(
           id:   'twitter_delete'

app/assets/javascripts/app/controllers/_profile/token_access.coffee

@@ -63,7 +63,7 @@ class ProfileTokenAccess extends App.ControllerSubContent
       )
 
     new App.ControllerConfirm(
-      message: __('Sure?')
+      message: __('Are you sure?')
       callback: callback
       container: @el.closest('.content')
     )

app/assets/javascripts/app/controllers/maintenance.coffee

@@ -52,7 +52,7 @@ class Maintenance extends App.ControllerSubContent
       )
     if value
       new App.ControllerConfirm(
-        message: __('Sure?')
+        message: __('Are you sure?')
         callback: callback
         onCancel: =>
           @modeSetting.prop('checked', false)

app/assets/javascripts/app/controllers/tag.coffee

@@ -130,9 +130,9 @@ class Edit extends App.ControllerModal
 class DestroyConfirm extends App.ControllerModal
   buttonClose: true
   buttonCancel: true
-  buttonSubmit: __('yes')
+  buttonSubmit: __('Yes')
   buttonClass: 'btn--danger'
-  head: __('Confirm')
+  head: __('Confirmation')
   small: true
 
   content: ->

app/assets/javascripts/app/controllers/taskbar_widget.coffee

@@ -127,7 +127,7 @@ class Remove extends App.ControllerModal
   buttonCancel: true
   buttonSubmit: __('Discard Changes')
   buttonClass: 'btn--danger'
-  head: __('Confirm')
+  head: __('Confirmation')
 
   content: ->
     App.i18n.translateContent('Tab has changed, do you really want to close it?')