Fix webview freeze

Addresses an issue where org webviews would freeze after dragging server
icons in the sidebar.

Fix Travis errors

app/renderer/js/main.js

@@ -159,22 +159,24 @@ class ServerManagerView {
 		const showSidebar = ConfigUtil.getConfigItem('showSidebar', true);
 		this.toggleSidebar(showSidebar);
 		// Allow dragging of server tabs and update the data-tab-id
-		const onEnd = event => {
+		const onEnd = () => {
 			const newTabs = [];
 			const domains = [];
+			const indexMap = {};
 			const tabElements = document.querySelectorAll('#tabs-container .tab');
 			tabElements.forEach((el, index) => {
 				const oldIndex = +Number(el.getAttribute('data-tab-id')) % tabElements.length;
 				el.setAttribute('data-tab-id', index.toString());
 				domains.push(DomainUtil.getDomain(oldIndex));
 				newTabs.push(this.tabs[oldIndex]);
+				indexMap[String(oldIndex)] = index;
 				this.replaceServer(domains[index], index, oldIndex);
 			});
 			for (let index = 0; index < domains.length; ++index) {
 				DomainUtil.updateSavedServer(domains[index].url, index);
 			}
+			this.activeTabIndex = indexMap[String(this.activeTabIndex)];
 			this.tabs = newTabs;
-			this.activeTabIndex = event.newIndex;
 			ipcRenderer.send('update-menu', {
 				tabs: this.tabs,
 				activeTabIndex: this.activeTabIndex
@@ -238,6 +240,10 @@ class ServerManagerView {
 		const onHoverOut = this.onHoverOut.bind(this, oldIndex);
 		this.tabs[index].updateListeners(onClick, onHover, onHoverOut);
 		this.tabs[index].updateShortcutText(index);
+		this.tabs[index].webview.props.index = index;
+		this.tabs[index].webview.props.isActive = () => {
+			return oldIndex === this.activeTabIndex;
+		};
 	}
 
 	initActions() {