SalesRep as a ListPicker

[wantero]

PR Checklist

• See our contributing guidelines: https://github.com/progress/JSDO/blob/master/contributing.md#contribute-to-the-code-base.
• You have signed the CLA.

[Describe the impact of the changes here. Please include issue # if applicable.]
Add SalesRep as a ListPicker.

[joshualan]

@wantero I tried just running this app.

Steps:

1. Cloned your branch
2. tns create myapp --template /path/to/your/branch
3. tns preview
4. Checked this on Android and iOS phones via NativeScript Preview app and both had this error:

Error calling module function

Error: com.tns.NativeScriptException: Failed to find module: "@progress/jsdo-core", relative to: app/tns_modules/
    com.tns.Module.resolvePathHelper(Module.java:146)
    com.tns.Module.resolvePath(Module.java:55)
    com.tns.Runtime.runModule(Native Method)
    com.tns.Runtime.runModule(Runtime.java:624)
    com.tns.Runtime.run(Runtime.java:616)
    com.tns.NativeScriptApplication.onCreate(NativeScriptApplication.java:21)
    android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1154)
    android.app.ActivityThread.handleBindApplication(ActivityThread.java:6204)
    android.app.ActivityThread.access$1200(ActivityThread.java:236)
    android.app.ActivityThread$H.handleMessage(ActivityThread.java:1784)
    android.os.Handler.dispatchMessage(Handler.java:106)
    android.os.Looper.loop(Looper.java:214)
    android.app.ActivityThread.main(ActivityThread.java:7032)
    java.lang.reflect.Method.invoke(Native Method)
    com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
    com.android.internal.os.ZygoteInit.main(ZygoteInit.java:965)
File: "<unknown>, line: 1, column: 265

StackTrace:
	Frame: function:'require', file:'', line: 1, column: 266
	Frame: function:'', file:'file:///data/data/org.nativescript.preview/files/app/shared/progress.service.js', line: 3, column: 19
	Frame: function:'require', file:'', line: 1, column: 266
	Frame: function:'', file:'file:///data/data/org.nativescript.preview/files/app/login/login.component.js', line: 8, column: 26
	Frame: function:'require', file:'', line: 1, column: 266
	Frame: function:'', file:'file:///data/data/org.nativescript.preview/files/app/app-routing.module.js', line: 5, column: 25
	Frame: function:'require', file:'', line: 1, column: 266
	Frame: function:'', file:'file:///data/data/org.nativescript.preview/files/app/app.module.js', line: 6, column: 28
	Frame: function:'require', file:'', line: 1, column: 266
	Frame: function:'', file:'file:///data/data/org.nativescript.preview/files/app/main.js', line: 5, column: 20
	Frame: function:'require', file:'', line: 1, column: 266

Unsure whether this has to do with an npm issue or if it's on your end

[wantero]

@joshualan,

I did the same steps and got the same error using tns preview on iOS. I try tns run android and it´s running on android studio emulator.

I made a git clone from project repository (https://github.com/progress/template-master-detail-progress-ng.git) and got the same error using tns preview.