[data-export] Add number of filtered records (#302)

## Describe your changes
Added number of filtered records in data export page

<img width="1334" alt="image"
src="https://github.com/tprouvot/Salesforce-Inspector-reloaded/assets/35368290/3770d8f7-a005-4857-99c1-48ed064ca1c8">

## Issue ticket number and link
Closes #300 

## Checklist before requesting a review
- [x] I have read and understand the [Contributions
section](https://github.com/tprouvot/Salesforce-Inspector-reloaded#contributions)
- [x] Target branch is releaseCandidate and not master
- [x] I have performed a self-review of my code
- [x] I ran the [unit
tests](https://github.com/tprouvot/Salesforce-Inspector-reloaded#unit-tests)
and my PR does not break any tests
- [x] I documented the changes I've made on the
[CHANGES.md](https://github.com/tprouvot/Salesforce-Inspector-reloaded/blob/master/CHANGES.md)
and followed actual conventions
- [ ] I added a new section on
[how-to.md](https://github.com/tprouvot/Salesforce-Inspector-reloaded/blob/master/docs/how-to.md)
(optional)

CHANGES.md

@@ -2,6 +2,7 @@
 
 ## Version 1.23
 
+- Show the number of filtered records in data export [feature 300](https://github.com/tprouvot/Salesforce-Inspector-reloaded/issues/300) (feature by Vranisimo(https://github.com/vranisimo))
 - Hide RecType and Name field from popup when field is not set [feature 298](https://github.com/tprouvot/Salesforce-Inspector-reloaded/issues/298)
 - Display API version in Org tab [feature 293](https://github.com/tprouvot/Salesforce-Inspector-reloaded/issues/293) (feature by [Camille Guillory](https://github.com/CamilleGuillory))
 - Add the possibility to hide fields API names after users clicked "Show fields API names"

addon/data-export-test.js

@@ -308,7 +308,7 @@ export async function dataExportTest(test) {
   // Filter results
   vm.setResultsFilter("TRU");
   assertEquals(false, vm.isWorking);
-  assertEquals("Exported 4 records", vm.exportStatus);
+  assertEquals("Filtered 2 records out of 4 records", vm.exportStatus);
   assertEquals([
     ["_", "Name", "Checkbox__c", "Number__c"],
     [{type: "Inspector_Test__c"}, "test1", false, 100.01],
@@ -323,7 +323,7 @@ export async function dataExportTest(test) {
   // Clear filter
   vm.setResultsFilter("");
   assertEquals(false, vm.isWorking);
-  assertEquals("Exported 4 records", vm.exportStatus);
+  assertEquals("Filtered 4 records out of 4 records", vm.exportStatus);
   assertEquals([
     ["_", "Name", "Checkbox__c", "Number__c"],
     [{type: "Inspector_Test__c"}, "test1", false, 100.01],

addon/data-export.js

@@ -981,6 +981,7 @@ function RecordTable(vm) {
         if (isVisible(rt.table[r], filter)) countOfVisibleRecords++;
       }
       this.countOfVisibleRecords = countOfVisibleRecords;
+      vm.exportStatus = "Filtered " + countOfVisibleRecords + " records out of " + rt.records.length + " records";
     },
     getVisibleTable() {
       if (vm.resultsFilter) {