Add X-UA-Compatible tag to try to get IE-11 to behave

as per discussion https://discourse.nodered.org/t/dashboard-ui-not-working/2838

Author: Dave Conway-Jones

CHANGELOG.md

@@ -8,7 +8,7 @@
  - Fix chart colours to have more than 9 colours just in case - Issue #465
  - Remove circular ref in menu that caused problems with 0.20 beta
  - Let ui_text node send data onBlur when in wait for key mode
- - Update Angular dependency to 1.7.6   - Issue #462
+ - Update Angular dependency to 1.7.6 - Issue #462
 
 ### 2.13.0: Milestone Release
 

src/index.html

@@ -25,6 +25,7 @@
     <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
     <meta name="apple-mobile-web-app-title" content="Node-RED">
     <meta name="mobile-web-app-capable" content="yes">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <link rel="manifest" href="manifest.json">
     <link rel="icon" sizes="192x192" href="icon192x192.png">
     <link rel="shortcut icon" type="image/png" href="icon64x64.png">