Created XSLT Tooltips (#243)

Co-authored-by: widlam <mikolaj.widla@gmail.com>
Reviewed-on: #243

Frontend/src/assets/tooltips/xpath/xpathdiffs.json

@@ -4,6 +4,9 @@
         {
             "category":"What is XPath",
             "description":"XPath is a query language used for selecting nodes from XML and processing them. It may perform operations on strings, numbers and boolean values."
+        },
+        {
+            "category":"What's new in XPath?"
         }
     ],
     "VersionDiffs":
@@ -34,12 +37,11 @@
             "version":"3.1",
             "diffs":
             [
-                "New operator for function chaining '=>' ",
+                "New operator for function chaining '=>'",
                 "Introduced maps that store data in pair 'key:value' - 'map{ key : value, key : value }'",
                 "Introduced arrays - they differ from sequences in that they can be nested 'array{1, 5, 7, (10 to 20)}'"
             ]
         }
-
     ]