feat: change CImageLazy active mechanism

Author: woothu

src/components/Image/CImage.vue

@@ -55,7 +55,8 @@ export default {
   },
   computed: {
     isActive () {
-      return true
+      //active prop is present in CImageLazy component, here always undefined
+      return this.active !== false
     },
     alignClass () {
       if (this.align === 'left') {

src/components/Image/CImageLazy.vue

@@ -35,9 +35,6 @@ export default {
     this.removeListener()
   },
   computed: {
-    isActive () {
-      return this.active
-    },
     animationClasses () {
       if (this.fade) {
         return { 'c-opacity-0' : !this.animated }