Add support for clickable links and other webview options (#2396)

* Add support for clickable links and other webview options
- Added click handling
- Added suport for localResourceRoots to be read in the webview

* Options should not be mandatory

* Ensure the constructor-defined properties are preserved
- This fixes issue where the extensionFolderPath was lost during webview withProperties call in the modelbuilder.

* enableCommandUris should be a getter

* Add position support to webview and to flexContainer

* Fix regressions on editor view caused by merge

src/sql/parts/modelComponents/componentBase.ts

@@ -139,6 +139,14 @@ export abstract class ComponentBase extends Disposable implements IComponent, On
 		this.setPropertyFromUI<sqlops.ComponentProperties, number | string>((props, value) => props.width = value, newValue);
 	}
 
+	public get position(): string {
+		return this.getPropertyOrDefault<sqlops.EditorProperties, string>((props) => props.position, '');
+	}
+
+	public set position(newValue: string) {
+		this.setPropertyFromUI<sqlops.EditorProperties, string>((properties, position) => { properties.position = position; }, newValue);
+	}
+
 	public convertSizeToNumber(size: number | string): number {
 		if (size && typeof (size) === 'string') {
 			if (size.toLowerCase().endsWith('px')) {