[Bug Report]2.14.0 select displays value after setting up value

[wtusmchen]

Environment

iview 2.14.0

Reproduction link

https://jsfiddle.net/yyrzhm46/862/

Steps to reproduce

更新到2.14后下拉框无法设置选中值，显示undefined

What is expected?

现在选中的item

What is actually happening?

显示undefined

[iview-bot]

Translation of this issue:
Environment
IView 2.14.0
Reproduction link
https://jsfiddle.net/yyrzhm46/862/
Steps to reproduce
Updated to 2.14 after the drop-down box can not set the selected value, showing undefined
What is expected?
The selected item now
What is actually happening?
Display undefined

[icarusion]

@SergioCrisostomo Before version, the logic of Option label is:

The content of the option, read slot default. If not have slot, it will show the label. If not have label, show the value. Mostly just write slot, but for cumtomized option, this is useful.

@wtusmchen you can set a slot to Option to fix now.

[aleksanderd]

some more notes...

1. Using the label without slot:

<i-option v-for="option in options" :key="option.id" :value="option.id" :label="option.title" />

will cause an error:
TypeError: option.componentOptions.children is undefined

2. Using option's slot for markup and attribute label for input's value(worked before) not working now - seems to be the slot's markup just copied to inputs value. label attribute is ignored if slot present? How can I provide different markup for render selected value?

[aleksanderd]

also, now remoteMethod called on option select :(