Fixing a bug with mosh links. (#407)

FluentTerminal.Models/StringExtensions.cs

@@ -0,0 +1,12 @@
+namespace FluentTerminal.Models
+{
+    public static class StringExtensions
+    {
+        /// <summary>
+        /// Compares two strings for equality, but assumes that null string is equal to an empty string.
+        /// </summary>
+        public static bool NullableEqualTo(this string original, string other) => string.IsNullOrEmpty(original)
+            ? string.IsNullOrEmpty(other)
+            : original.Equals(other);
+    }
+}