Improve titles, headers and tooltips in Add Password and Change Permissions (#4210)

# Description of Changes
Improve titles, headers and tooltips in Add Password and Change
Permissions

frontend/public/locales/en-GB/translation.json

@@ -72,6 +72,9 @@
     "githubSubmit": "GitHub - Submit a ticket",
     "discordSubmit": "Discord - Submit Support post"
   },
+  "warning": {
+    "tooltipTitle": "Warning"
+  },
   "delete": "Delete",
   "username": "Username",
   "password": "Password",
@@ -1786,9 +1789,8 @@
     "error": {
       "failed": "An error occurred while encrypting the PDF."
     },
+    "title": "Passwords & Encryption",
     "passwords": {
-      "title": "Passwords",
-      "stepTitle": "Passwords & Encryption",
       "completed": "Passwords configured",
       "user": {
         "label": "User Password",
@@ -1799,13 +1801,9 @@
         "placeholder": "Enter owner password"
       }
     },
-    "permissions": {
-      "stepTitle": "Document Permissions"
-    },
     "encryption": {
-      "title": "Encryption",
       "keyLength": {
-        "label": "Key Length",
+        "label": "Encryption Key Length",
         "40bit": "40-bit (Low)",
         "128bit": "128-bit (Standard)",
         "256bit": "256-bit (High)"
@@ -1831,20 +1829,19 @@
         "bullet2": "128-bit: Standard security, widely supported",
         "bullet3": "256-bit: Maximum security, requires modern viewers"
       },
-      "restrictions": {
-        "title": "Document Restrictions",
-        "text": "These restrictions control what users can do with the PDF. Most effective when combined with an owner password."
+      "permissions": {
+        "text": "These permissions control what users can do with the PDF. Most effective when combined with an owner password."
       }
     }
   },
   "changePermissions": {
     "completed": "Permissions changed",
     "submit": "Change Permissions",
+    "title": "Document Permissions",
     "error": {
       "failed": "An error occurred while changing PDF permissions."
     },
-    "restrictions": {
-      "title": "Document Restrictions",
+    "permissions": {
       "preventAssembly": {
         "label": "Prevent assembly of document"
       },
@@ -1878,8 +1875,10 @@
         "title": "Change Permissions"
       },
       "description": {
-        "title": "Description",
-        "text": "Changes document permissions. Warning: To make these restrictions unchangeable, use the Add Password tool to set an owner password."
+        "text": "Changes document permissions, allowing/disallowing access to different features in PDF readers."
+      },
+      "warning": {
+        "text": "To make these permissions unchangeable, use the Add Password tool to set an owner password."
       }
     }
   }