Merge branch 'add-ie-compat-notice' into 'master'

Added info about common UI problems if IE Compatibility View mode is enabled.

/cc @sytses @Haydn

See merge request !939

doc/install/requirements.md

@@ -110,3 +110,7 @@ On a very active server (10,000 active users) the Sidekiq process can use 1GB+ o
 - Safari 7+ (known problem: required fields in html5 do not work)
 - Opera (Latest released version)
 - IE 10+
+
+### Common UI problems with IE
+
+If you experience UI issues with Internet Explorer, please make sure that you have the `Compatibility View` mode disabled.
\ No newline at end of file