Merge branch 'dev' of https://github.com/SharePoint/sp-dev-fx-controls-react into add-folder-explorer

Author: joelfmrodrigues

CHANGELOG.JSON

@@ -25,13 +25,16 @@
           "`FilePicker`: Button text overflow fix + global classnames and properties",
           "`FieldUserRenderer`: implementation of `api/SP.UserProfiles.PeopleManager/GetPropertiesFor` is not working on on-prem [#468](https://github.com/SharePoint/sp-dev-fx-controls-react/issues/468)",
           "`Placeholder`: Placeholder component is not rendering after a string change in it's properties [#469](https://github.com/SharePoint/sp-dev-fx-controls-react/pull/469)",
-          "`ListView` documentation update: `minWidth` instead of `maxWidth` [#480](https://github.com/SharePoint/sp-dev-fx-controls-react/pull/480)"
+          "`ListView` documentation update: `minWidth` instead of `maxWidth` [#480](https://github.com/SharePoint/sp-dev-fx-controls-react/pull/480)",
+          "`DateTimePicker`: Minutes and Seconds validation [#495](https://github.com/SharePoint/sp-dev-fx-controls-react/issues/495)",
+          "`FilePicker`: bingAPIKey not working [#489](https://github.com/SharePoint/sp-dev-fx-controls-react/issues/489)"
         ]
       },
       "contributions": [
         "[Alexander Kleshcheov](https://github.com/SharePickle)",
         "[Jason S](https://github.com/jason-appliedis)",
         "[JonasBjerke89](https://github.com/JonasBjerke89)",
+        "[Léo Maradan](https://github.com/Leomaradan)",
         "[Matej](https://github.com/Matej4386)",
         "[mgwojciech](https://github.com/mgwojciech)",
         "[Piotr Siatka](https://github.com/siata13)",

package-lock.json

@@ -1,3 +1,4 @@
+import * as strings from 'ControlStrings';
 import * as React from 'react';
 import { ITimeComponentProps } from './ITimeComponentProps';
 import { MaskedTextField } from 'office-ui-fabric-react/lib/TextField';
@@ -46,8 +47,17 @@ export default class MinutesComponent extends React.Component<ITimeComponentProp
           label=""
           value={value ? TimeHelper.suffixZero(value.toString()) : "00"}
           onGetErrorMessage={(val) => {
-            onChange(val);
-            return "";
+            let message = "";
+            const minutes: number = parseInt(val);
+            if (isNaN(minutes)) {
+              message = strings.DateTimePickerMinuteValueInvalid;
+            }
+
+            if (!message) {
+              onChange(val);
+            }
+
+            return message;
           }}
           mask="59"
           maskFormat={{