Revert "AppSidebar: fix tab validation: tabs are optional" (#447)

Revert "AppSidebar: fix tab validation: tabs are optional"

src/components/AppSidebar/AppSidebar.vue

@@ -166,27 +166,22 @@ export default {
 	},
 	mounted() {
 		// Init tabs from $children
-		const tabs = this.$children.filter(comp => comp.$options.name === 'AppSidebarTab')
-		if (tabs.length === 0 || tabs.length === this.$children.length) {
-			this.tabs = tabs.reduce((tabs, tab) => {
-				if (!tab.name || typeof tab.name !== 'string') {
-					Vue.util.warn(`This tab is missing a valid name: ${tab.name}`, tab)
-					return tabs
-				}
-				if (!IsValidString(tab.id)) {
-					Vue.util.warn(`This tab is missing a valid id: ${tab.id}`, tab)
-					return tabs
-				}
-				if (!IsValidString(tab.icon)) {
-					Vue.util.warn(`This tab is missing a valid icon: ${tab.icon}`, tab)
-					return tabs
-				}
-				tabs.push(tab)
+		this.tabs = this.$children.reduce((tabs, tab) => {
+			if (!tab.name || typeof tab.name !== 'string') {
+				Vue.util.warn(`This tab is missing a valid name: ${tab.name}`, tab)
 				return tabs
-			}, [])
-		} else {
-			Vue.util.warn('You must use either AppSideTab\'s or custom elements.')
-		}
+			}
+			if (!IsValidString(tab.id)) {
+				Vue.util.warn(`This tab is missing a valid id: ${tab.id}`, tab)
+				return tabs
+			}
+			if (!IsValidString(tab.icon)) {
+				Vue.util.warn(`This tab is missing a valid icon: ${tab.icon}`, tab)
+				return tabs
+			}
+			tabs.push(tab)
+			return tabs
+		}, [])
 
 		// init active tab if exists
 		if (this.tabs.length > 0) {