Bug 76887 [content assist] Template validation is case sensitive
Test case: Type SYS Ctrl-Space Type o You are left with no code completions. This differs from the code completion proposals where the prefix matching is not case sensitive. (note this is a problem in both the JDT TemplateProposal and the JFace text TemplateProposal)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/template/contentassist/TemplateProposal.java
private final Template fTemplate;
	private final TemplateContext fContext;
	private final Image fImage;
	private IRegion fRegion;
	private int fRelevance;
	private IRegion fSelectedRegion; 
	private String fDisplayString;
		
	/**
	 * Creates a template proposal with a template and its context.
	 * 
	 * @param template  the template
	 * @param context   the context in which the template was requested
	 * @param region 	the region this proposal applies to
	 * @param image     the icon of the proposal