[FIX] Sound upload not working in IE and FF (#11139)

packages/rocketchat-custom-sounds/client/admin/soundEdit.html

@@ -13,7 +13,7 @@
 				</div>
 				<div class="input-line">
 					<label for="image">{{_ "Sound_File_mp3"}}</label>
-					<input id="image" type="file" accept="audio/mp3,audio/mpeg"/>
+					<input id="image" type="file" accept="audio/mp3,audio/mpeg,audio/x-mpeg,audio/mpeg3,audio/x-mpeg-3,.mp3"/>
 				</div>
 				<nav>
 					<button class='button button-block cancel' type="button"><span>{{_ "Cancel"}}</span></button>

packages/rocketchat-custom-sounds/client/admin/soundEdit.js

@@ -93,7 +93,7 @@ Template.soundEdit.onCreated(function() {
 		}
 
 		if (this.soundFile) {
-			if (!/audio\/mp3/.test(this.soundFile.type)) {
+			if (!/audio\/mp3/.test(this.soundFile.type) && !/audio\/mpeg/.test(this.soundFile.type) && !/audio\/x-mpeg/.test(this.soundFile.type)) {
 				errors.push('FileType');
 				toastr.error(TAPi18n.__('error-invalid-file-type'));
 			}