Update JetBrains.gitignore according to the knowledge base article

Global/JetBrains.gitignore

@@ -1,32 +1,26 @@
 # Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm
-
-*.iml
-
-## Directory-based project format:
-.idea/
-# if you remove the above rule, at least ignore the following:
+# Reference https://intellij-support.jetbrains.com/entries/23393067
 
 # User-specific stuff:
-# .idea/workspace.xml
-# .idea/tasks.xml
-# .idea/dictionaries
+.idea/workspace.xml
+.idea/tasks.xml
+.idea/dictionaries
 
 # Sensitive or high-churn files:
-# .idea/dataSources.ids
-# .idea/dataSources.xml
-# .idea/sqlDataSources.xml
-# .idea/dynamic.xml
-# .idea/uiDesigner.xml
+.idea/dataSources.ids
+.idea/dataSources.xml
+.idea/sqlDataSources.xml
+.idea/dynamic.xml
+.idea/uiDesigner.xml
 
 # Gradle:
-# .idea/gradle.xml
-# .idea/libraries
+.idea/gradle.xml
+.idea/libraries
 
 # Mongo Explorer plugin:
-# .idea/mongoSettings.xml
+.idea/mongoSettings.xml
 
 ## File-based project format:
-*.ipr
 *.iws
 
 ## Plugin-specific files: