ion-navbar take not into account with $navbar-ios-height

[ionitron-bot]

Original issue by @seed880505 on 2017-09-04T08:51:49Z

Resources:
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Ionic version: (check one with "x")
[ ] 1.x (For Ionic 1.x issues, please use https://github.com/ionic-team/ionic-v1)
[ ] 2.x
[x] 3.x

I'm submitting a ... (check one with "x")
[x] bug report
[ ] feature request
[ ] support request => Please do not submit support requests here, use one of these channels: https://forum.ionicframework.com/ or http://ionicworldwide.herokuapp.com/

Current behavior:

Define scss variable $navbar-ios-height, but navbar only take into accout with $toolbar-ios-height.

Expected behavior:

ion-navbar should take into account $navbar-ios-height, instead of $toolbar-ios-height.

Steps to reproduce:

Related code:

$navbar-md-height: 80px; // ignored
$toolbar-md-height: 40px; // true height

Other information:

Ionic info: (run ionic info from a terminal/cmd prompt and paste output below):

cli packages:
    @ionic/cli-utils  : 1.9.2
    ionic (Ionic CLI) : 3.9.2

global packages:
    Cordova CLI : 7.0.1

local packages:
    @ionic/app-scripts : 2.1.4
    Cordova Platforms  : none
    Ionic Framework    : ionic-angular 3.6.0

System:
    Android SDK Tools : 26.0.2
    Node              : v7.10.1
    npm               : 4.2.0
    OS                : Windows 7