Put back default strings on dialogs

But make them work by calling _t in render rather than
getDefaultProps().

Also sort out some 'Warning!' strings

src/components/views/dialogs/ChatInviteDialog.js

@@ -307,7 +307,6 @@ module.exports = React.createClass({
                 Modal.createDialog(ErrorDialog, {
                     title: "Failed to invite",
                     description: ((err && err.message) ? err.message : "Operation failed"),
-                    button: _t("OK"),
                 });
                 return null;
             })
@@ -321,7 +320,6 @@ module.exports = React.createClass({
                 Modal.createDialog(ErrorDialog, {
                     title: "Failed to invite user",
                     description: ((err && err.message) ? err.message : "Operation failed"),
-                    button: _t("OK"),
                 });
                 return null;
             })
@@ -343,7 +341,6 @@ module.exports = React.createClass({
                 Modal.createDialog(ErrorDialog, {
                     title: "Failed to invite",
                     description: ((err && err.message) ? err.message : "Operation failed"),
-                    button: _t("OK"),
                 });
                 return null;
             })
@@ -403,7 +400,6 @@ module.exports = React.createClass({
             Modal.createDialog(ErrorDialog, {
                 title: "Failed to invite the following users to the " + room.name + " room:",
                 description: errorList.join(", "),
-                button: _t("OK"),
             });
         }
         return addrs;

src/components/views/dialogs/ErrorDialog.js

@@ -27,6 +27,7 @@ limitations under the License.
 
 import React from 'react';
 import sdk from '../../../index';
+import { _t } from '../../../languageHandler';
 
 export default React.createClass({
     displayName: 'ErrorDialog',
@@ -44,6 +45,9 @@ export default React.createClass({
     getDefaultProps: function() {
         return {
             focus: true,
+            title: null,
+            description: null,
+            button: null,
         };
     },
 
@@ -57,13 +61,13 @@ export default React.createClass({
         const BaseDialog = sdk.getComponent('views.dialogs.BaseDialog');
         return (
             <BaseDialog className="mx_ErrorDialog" onFinished={this.props.onFinished}
-                    title={this.props.title}>
+                    title={this.props.title || _t('Error')}>
                 <div className="mx_Dialog_content">
-                    {this.props.description}
+                    {this.props.description || _t('An error has occurred.')}
                 </div>
                 <div className="mx_Dialog_buttons">
                     <button ref="button" className="mx_Dialog_primary" onClick={this.props.onFinished}>
-                        {this.props.button}
+                        {this.props.button || _t('OK')}
                     </button>
                 </div>
             </BaseDialog>

src/components/views/dialogs/InteractiveAuthDialog.js

@@ -20,6 +20,7 @@ import Matrix from 'matrix-js-sdk';
 import React from 'react';
 
 import sdk from '../../../index';
+import { _t } from '../../../languageHandler';
 
 import AccessibleButton from '../elements/AccessibleButton';
 
@@ -99,7 +100,7 @@ export default React.createClass({
         return (
             <BaseDialog className="mx_InteractiveAuthDialog"
                 onFinished={this.props.onFinished}
-                title={this.state.authError ? 'Error' : this.props.title}
+                title={this.state.authError ? 'Error' : (this.props.title || _t('Authentication'))}
             >
                 {content}
             </BaseDialog>

src/components/views/dialogs/NeedToRegisterDialog.js

@@ -26,6 +26,7 @@ limitations under the License.
 import React from 'react';
 import dis from '../../../dispatcher';
 import sdk from '../../../index';
+import { _t } from '../../../languageHandler';
 
 module.exports = React.createClass({
     displayName: 'NeedToRegisterDialog',
@@ -52,10 +53,10 @@ module.exports = React.createClass({
         return (
             <BaseDialog className="mx_NeedToRegisterDialog"
                 onFinished={this.props.onFinished}
-                title={this.props.title}
+                title={this.props.title || _t('Registration required')}
             >
                 <div className="mx_Dialog_content">
-                    {this.props.description}
+                    {this.props.description || _t('A registered account is required for this action')}
                 </div>
                 <div className="mx_Dialog_buttons">
                     <button className="mx_Dialog_primary" onClick={this.props.onFinished} autoFocus={true}>

src/components/views/dialogs/QuestionDialog.js

@@ -16,6 +16,7 @@ limitations under the License.
 
 import React from 'react';
 import sdk from '../../../index';
+import { _t } from '../../../languageHandler';
 
 export default React.createClass({
     displayName: 'QuestionDialog',
@@ -63,7 +64,7 @@ export default React.createClass({
                 </div>
                 <div className="mx_Dialog_buttons">
                     <button className="mx_Dialog_primary" onClick={this.onOk} autoFocus={this.props.focus}>
-                        {this.props.button}
+                        {this.props.button || _t('OK')}
                     </button>
                     {this.props.extraButtons}
                     {cancelButton}