WSOTWO-116: Added an ability to detect possibility of creating inner element in the validator
Merge
Merge branch 'master' into WSOTWO-91

Conflicts:
	codenvy-ext-wso2-editor/src/main/java/com/codenvy/ide/client/editor/WSO2Editor.java
	codenvy-ext-wso2-editor/src/main/java/com/codenvy/ide/client/elements/RootElement.java
	codenvy-ext-wso2-editor/src/main/java/com/codenvy/ide/client/elements/mediators/Filter.java
	codenvy-ext-wso2-editor/src/main/java/com/codenvy/ide/client/elements/mediators/Switch.java