refactor(ui): modal: use hidden class

static/css/components/contextMenu.css

@@ -10,7 +10,7 @@
     padding: 6px;
     min-width: 200px;
     z-index: 2000;
-    display: none;
+    display: block;
     animation: contextMenuIn 0.15s ease-out;
 }
 

static/css/components/modals.css

@@ -126,7 +126,7 @@
     width: 100%;
     height: 100%;
     background-color: var(--color-overlay);
-    display: none;
+    display: flex;
     justify-content: center;
     align-items: center;
     z-index: 3000;

static/css/components/spinner.css

@@ -37,7 +37,7 @@
     text-align: center;
     margin: 20px 0;
     color: var(--color-text-medium);
-    display: none;
+    display: block;
 }
 
 .dropzone-icon {