Bug 300846 Add "Resolve Values" switch to Path Variables property page
HEAD Table showing path variables for a resource has 3 columns: Name, Value and Resolved Value. Given the fact that values are rather long the third column is hardly visible. My suggestion is to remove the third column and add a switch to resolve variables in the second column. I'll put up a mockup in a minute...
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/PathVariablesGroup.java
private void updateWidgetState(String selectedVarName) {
        updateVariableTable(selectedVarName);
        updateEnabledState();
    }
    /**
     * @param resource
     */
    public void setResource(IResource resource) {
    	currentResource = resource;
        if (resource != null)
        	pathVariableManager = resource.getProject().getPathVariableManager();
        else
        	pathVariableManager = ResourcesPlugin.getWorkspace().getPathVariableManager();
        removedVariableNames = new HashSet();
        tempPathVariables = new TreeMap();
        
        initTemporaryState();
    }
	/**
	 * Reloads the path variables from the project description.
	 */
	public void reloadContent() {
        removedVariableNames = new HashSet();
        tempPathVariables = new TreeMap();
		initTemporaryState();
		if (variableTable != null)
	        updateWidgetState(null);
	}
}