refactor: replace deprecated String.prototype.substr()

.substr() is deprecated so we replace it with functions which work similarily but aren't deprecated

Signed-off-by: Tobias Speicher <rootcommander@gmail.com>

idp/ui/src/containers/Login/Chooseaccount.js

@@ -85,7 +85,7 @@ function Chooseaccount({ loading, errors, classes, hello, history, dispatch }) {
             className={classes.accountListItem}
             disabled={!!loading}
             onClick={(event) => logon(event)}
-          ><ListItemAvatar><Avatar>{username.substr(0, 1)}</Avatar></ListItemAvatar>
+          ><ListItemAvatar><Avatar>{username.slice(0, 1)}</Avatar></ListItemAvatar>
             <ListItemText className="oc-light" primary={username} />
           </ListItem>
           <ListItem

idp/ui_config/paths.js

@@ -14,7 +14,7 @@ const envPublicUrl = process.env.PUBLIC_URL;
 function ensureSlash(inputPath, needsSlash) {
   const hasSlash = inputPath.endsWith('/');
   if (hasSlash && !needsSlash) {
-    return inputPath.substr(0, inputPath.length - 1);
+    return inputPath.slice(0, -1);
   } else if (!hasSlash && needsSlash) {
     return `${inputPath}/`;
   } else {

settings/ui/components/SettingsBundle.vue

@@ -49,7 +49,7 @@ export default {
   methods: {
     ...mapActions('Settings', ['saveValue']),
     getSettingComponent (setting) {
-      return 'Setting' + setting.type[0].toUpperCase() + setting.type.substr(1)
+      return 'Setting' + setting.type[0].toUpperCase() + setting.type.slice(1)
     },
     getValue (setting) {
       return this.getSettingsValue({ settingId: setting.id })