(maint) ensure select avoided when selection is specified

In the case that a selection is specified for tab selection, avoid
auto-selecting the first entry.

Author: jonathannewman

addon/components/ivy-tabs-tablist.js

@@ -24,11 +24,6 @@ let instanceCount = 0;
 export default class IvyTabsTabListComponent extends Component {
   registerWithTabsContainer = modifier(() => {
     this.args.tabsContainer.registerTabList(this);
-    // if none of the tabs are selected, try to select one
-    let selected = this.tabs.find((tab) => tab.isSelected);
-    if (!selected && this.tabs.length > 0) {
-      this.selectTab();
-    }
     return () => {
       this.args.tabsContainer.unregisterTabList(this);
     };
@@ -209,7 +204,7 @@ export default class IvyTabsTabListComponent extends Component {
   selectTab() {
     const selection = this.selection;
 
-    if (isNone(selection) || this.tabs.length === 1) {
+    if (isNone(selection) && this.tabs.length === 1) {
       this.selectTabByIndex(0);
     } else {
       this.selectTabByModel(selection);