Add changelog for Cloud Manager 1.5.0

Author: Jskobos

src/content/changelog/cloud-manager-1-5-0.md

@@ -0,0 +1,22 @@
+---
+title: Cloud Manager v1.5.0
+date: 2020-04-07T05:00:00.000Z
+version: 1.5.0
+changelog:
+  - Cloud Manager
+---
+
+### Changed:
+
+- [Performance] Lazy load Domains data
+- Set a timeout when requesting Gravatars
+- Preserve Support ticket text on page reload
+
+### Fixed:
+
+- Account tab crashing for some users
+- Fix handling of local storage on logout
+- Longview NGINX tab crashing for some users
+- Screen readers cannot access "Create Linode" interface
+- Values on LV Network graphs displayed incorrectly
+- Placeholder component double h1 display issue