Filter in plugin does not work correctly - ExtJS

I would like to know if you can help me with the following problems that occurred to me when creating filters within the plugin that I am creating.

Problem 1:

The filter with the listener change I have assigned to clean the data, once the user chooses an item in the list. Everything is great, until, when I do a search for one of them: name / description / id and I click on the result that was found (item), clean it correctly and go back to show all. Now, when I find an item when I search, and press enter , I select the item, but I do not clean it with the filter and therefore, the list with all the items does not appear , but only the one that I selected.

Code (Plugin and Filters)

Ext.define("M5.view.custom.FilterCustom", {
    extend: "Ext.AbstractPlugin",
    xtype: 'filtercustom',
    name: 'customFilter',
    fieldName: 'name',
    fieldName: 'desc',
    fieldName: 'id',
    constructor: function() {
        var me = this;
        me.callParent(arguments);
    },
    init: function(combo) {
        var me = this;
        combo.on("keyup", function() {
            var store = combo.getStore();
            var value = combo.rawValue;
            store.clearFilter();
            var cfilter = [
            new Ext.util.Filter({
                filterFn: function(item) {
                    return item.data.name.indexOf(value) !== -1 || item.data.id.indexOf(value) !== -1 || item.data.desc.indexOf(value) !== -1;
                }
                    })];
            var test = me;
            console.log(test);
            //console.log('Yaay, the filter works fine!');
            store.filter(cfilter);
        }, this),
        combo.on("change", function() {
            var store = combo.getStore();
            store.clearFilter();
        }, this);
    }
});

Problem 2:

When I do the search, you need to write exactly the value of each item to show / find it. And I need that even if I write lower case or uppercase I find it. Now, the problem with this is the (2.1) caseSensitive and the (2.2) anyMatch , which I do not understand where I should add them to work.

2.1:

  

caseSensitive: false

2.2:

  

anyMatch: true

Problem 3:

Los:

  

fieldName: 'blabla'

I should be able to use them when I validate in the listener keyup with the return , but, again, I have no idea how to correctly add that within the validation, since, stressing, I am something new with ExtJS . If someone can help, thank you very much.