Refactor ErrorNavItem to not need "this" parameter

Toward making edit/new/home pages functional, which do not have "this"

client/homebrew/pages/editPage/editPage.jsx

@@ -438,6 +438,13 @@ const EditPage = createClass({
 		return `https://www.reddit.com/r/UnearthedArcana/submit?title=${encodeURIComponent(title.toWellFormed())}&text=${encodeURIComponent(text)}`;
 	},
 
+	clearError : function(){
+		setState({
+			error    : null,
+			isSaving : false
+		})
+	},
+
 	renderNavbar : function(){
 		const shareLink = this.processShareId();
 
@@ -449,7 +456,7 @@ const EditPage = createClass({
 			<Nav.section>
 				{this.renderGoogleDriveIcon()}
 				{this.state.error ?
-					<ErrorNavItem error={this.state.error} parent={this}></ErrorNavItem> :
+					<ErrorNavItem error={this.state.error} clearError={clearError}></ErrorNavItem> :
 					<Nav.dropdown className='save-menu'>
 						{this.renderSaveButton()}
 						{this.renderAutoSaveButton()}

client/homebrew/pages/homePage/homePage.jsx

@@ -80,11 +80,19 @@ const HomePage = createClass({
 			brew : { ...prevState.brew, text: text },
 		}));
 	},
+
+	clearError : function(){
+		setState({
+			error    : null,
+			isSaving : false
+		})
+	},
+
 	renderNavbar : function(){
 		return <Navbar ver={this.props.ver}>
 			<Nav.section>
 				{this.state.error ?
-					<ErrorNavItem error={this.state.error} parent={this}></ErrorNavItem> :
+					<ErrorNavItem error={this.state.error} clearError={clearError}></ErrorNavItem> :
 					null
 				}
 				<NewBrewItem />

client/homebrew/pages/newPage/newPage.jsx

@@ -211,6 +211,13 @@ const NewPage = createClass({
 		}
 	},
 
+	clearError : function(){
+		setState({
+			error    : null,
+			isSaving : false
+		})
+	},
+
 	renderNavbar : function(){
 		return <Navbar>
 
@@ -220,7 +227,7 @@ const NewPage = createClass({
 
 			<Nav.section>
 				{this.state.error ?
-					<ErrorNavItem error={this.state.error} parent={this}></ErrorNavItem> :
+					<ErrorNavItem error={this.state.error} clearError={clearError}></ErrorNavItem> :
 					this.renderSaveButton()
 				}
 				<PrintNavItem />

client/homebrew/pages/userPage/userPage.jsx

@@ -39,10 +39,14 @@ const UserPage = (props)=>{
 		}] : [])
 	];
 
+	const clearError = ()=>{
+		setError(null);
+	};
+
 	const navItems = (
 		<Navbar>
 			<Nav.section>
-				{error && (<ErrorNavItem error={error} parent={null}></ErrorNavItem>)}
+				{error && (<ErrorNavItem error={error} clearError={clearError}></ErrorNavItem>)}
 				<NewBrew />
 				<HelpNavItem />
 				<VaultNavitem />