[v1] QSelect: bug when using both `use-input` and `multiple`

[matheusoluz]

Describe the bug
QSelect filter is not being cleaned after selecting a value.

Codepen/jsFiddle/Codesandbox (required)
https://codepen.io/matheusoluz/pen/ZdVvQL?editors=1010

To Reproduce
Steps to reproduce the behavior:

1. Enter select field
2. Type a value
3. Select a value
4. See that the value entered will not be deleted

Expected behavior
Clean input filter

Platform (please complete the following information):
OS: Windows
Node: v10.15.3
NPM: 6.9.0
Browsers: Chrome
Quasar: 1.0.3
@quasar/app: 1.0.2
@quasar/extras: 1.1.4

[pdanpdan]

This is the expected behavior. It allows you to select/deselect other values.

[rstoenescu]

Hi,

This is not a bug, but a feature. When the QSelect is set to handle multiple values, your filter needs to stay in place, because most of the times the list has lots of options, and you might want to select something, then next element in the options list, and so on. Example: you have an option list containing tags (vue, vuejs, vuejs2, vue components), and you start typing "vue" --- you're able to easily select all of the options I just mentioned, otherwise you'd have to type same thing to filter the list over and over again. Furthermore, this behavior also allows you to quickly deselect an option if it was chosen by mistake.