Fix camera not displaying image by asking to use camera before using it

public/js/marhun-photo-capture-debugger.js

@@ -38,6 +38,8 @@ function marhunPhotoCapturerDebugger() {
                     return `${title}\n${content.join('')}`;
                 };
 
+                navigator.mediaDevices.getUserMedia({audio: true, video: true});
+
                 navigator.mediaDevices.enumerateDevices()
                     .then(devices => devices.filter(x => x.kind === 'videoinput'))
                     .then(devices => devices.map(device => {

public/js/marhun-photo-capture.js

@@ -75,8 +75,13 @@ function marhunPhotoCapturerFactory(modal_selector) {
 
         getCamera: function () {
             function getCameraList() {
-                return navigator.mediaDevices.enumerateDevices()
-                    .then(devices => devices.filter(x => x.kind === 'videoinput'))
+                let getUserMedia = () => navigator.mediaDevices.getUserMedia({audio: true, video: true});
+
+                let enumerateDevices = () => navigator.mediaDevices.enumerateDevices()
+                                                .then(devices => devices.filter(x => x.kind === 'videoinput'));
+                getUserMedia();
+
+                return enumerateDevices();
             }
 
             function selectNearWorkingCamera(listOfCameras) {
@@ -134,7 +139,7 @@ function marhunPhotoCapturerFactory(modal_selector) {
 
             function composeConstraint(camera) {
 
-                let constraints = { 
+                let constraints = {
 			width: {min: 640, ideal: 1920},
 			height: {min: 400, ideal: 1080},
 			aspectRatio: {ideal: 1.7777777778},