Add manifest file for Mozilla Thunderbird v78.1.0 x64 (#2695)

* Add manifest file for Mozilla Thunderbird v78.1.0 x64

* Modify manifest file to account for the Manifest Validation error

manifests/Mozilla/Thunderbird/Thunderbird_v78.1.0/78.1.0.yaml

@@ -0,0 +1,27 @@
+# ================== General ==================
+
+Id: Mozilla.Thunderbird.Thunderbird_v78.1.0
+Version: 78.1.0
+Name: Thunderbird (English US)
+Publisher: Mozilla
+AppMoniker: thunderbird
+Tags: thunderbird, email, eMail, E-mail, email Client
+Description: Thunderbird is a free email application that’s easy to set up and customize!
+
+# ================== License ==================
+
+Homepage: https://www.thunderbird.net
+License: Mozilla Public License Version 2.0
+LicenseUrl: https://www.mozilla.org/en-US/MPL/2.0/
+
+# ================= Installer =================
+
+Installers:
+  - Arch: x64
+    Url: https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/78.1.0/win64/en-US/Thunderbird%20Setup%2078.1.0.msi
+    Sha256: 7F779DD397E06E76E356FCD2C4C9BC5DAD7A1334881516E25242D769D7B84BD9
+    InstallerType: msi
+    Switches:
+          Custom: /norestart
+          Silent: /qn
+          SilentWithProgress: /qb