Update UX strings (#163)

https://mozilla.invisionapp.com/share/5JDP20NYB#/screens/256782988

* update locked popup to roughly match mockups

https://mozilla.invisionapp.com/share/5JDP20NYB#/screens/257423172

* use "entry" language consistently throughout

* add back whitespace Atom removed

* back to unlock

* addressing code review comments

src/webextension/locales/en-US/manage.ftl

@@ -1,45 +1,45 @@
 toolbar-item-count = { $count ->
-   [one]   1 item
-  *[other] { $count } items
+   [one]   1 Entry
+  *[other] { $count } Entries
 }
 
-toolbar-add-item = Add Item
+toolbar-add-item = New Entry
 toolbar-go-home = Home
 toolbar-send-feedback = Feedback
 
-item-filter.placeholder = Filter…
+item-filter.placeholder = Search for an entry
 
-item-summary-new-item = (new item)
-item-summary-no-title = (no title)
-item-summary-no-username = (no username)
+item-summary-new-item = New Entry
+item-summary-no-title = (No Entry Name)
+item-summary-no-username = (No Username)
 
 homepage-no-passwords =
   Welcome to Lockbox! I'm Lockie, and I'm here to help you lock
   up your passwords!
   
-  To get started, click { add-item } above.
+  To get started, click { toolbar-add-item } above.
 
 homepage-under-10-passwords = { $count ->
    [1]     Hi there! It's your friend, Lockie!
            
-           You've added { $count } password. That's a great start!
+           You've added { $count } entry. That's a great start!
   *[other] Hi there! It's your friend, Lockie!
            
-           You've added { $count } passwords. That's a great start!
+           You've added { $count } entries. That's a great start!
 }
 
 homepage-under-50-passwords =
   Hey again! Just your pal Lockie checking in!
   
-  You've added { $count } passwords. Great job, keep it up!
+  You've added { $count } entries. Great job, keep it up!
 
 homepage-over-50-passwords =
   Welcome back! I hope you're having a great day!
   
-  You've added { $count } passwords. Wow, I'm really impressed!
+  You've added { $count } entries. Wow, I'm really impressed!
 
-item-details-title = Title
-item-details-origin = Origin
+item-details-title = Entry Name
+item-details-origin = Website Address
 item-details-username = Username
 item-details-copy-username = Copy
   .title = Copy the username to the clipboard
@@ -48,21 +48,21 @@ item-details-copy-password = Copy
   .title = Copy the password to the clipboard
 item-details-notes = Notes
 
-item-details-edit = Edit
-item-details-delete = Delete
+item-details-edit = Edit Entry
+item-details-delete = Delete Entry
 
-item-details-save = Save
+item-details-save = Save Entry
 item-details-cancel = Cancel
 
 [[dialogs]]
 
 modal-root-title = Modal dialog
 
 modal-cancel
-  .text = This item has unsaved changes? Are you sure you want to discard them?
-  .primaryButtonLabel = Discard
-  .secondaryButtonLabel = Go back
+  .text = This entry has unsaved changes. Are you sure you want to discard them?
+  .primaryButtonLabel = Discard Changes
+  .secondaryButtonLabel = Go Back
 modal-delete
-  .text = Are you sure you want to delete this item?
-  .primaryButtonLabel = Delete
+  .text = Are you sure you want to delete this entry?
+  .primaryButtonLabel = Delete Entry
   .secondaryButtonLabel = Cancel

src/webextension/locales/en-US/popup.ftl

@@ -1,5 +1,5 @@
-unlock-prompt-title = Unlock your Lockbox
-unlock-prompt-desc = Enter your master password to unlock:
+unlock-prompt-title = Lockbox
+unlock-prompt-desc = Enter your password
 
 unlock-prompt-err-invalid-pwd = Wrong password