refactor(code): Cleaned-up the code base

static/css/upload/dialogs.css

@@ -0,0 +1,95 @@
+.modal-backdrop {
+    position: fixed;
+    inset: 0;
+    display: none;
+    background: rgba(128, 128, 128, .42);
+    z-index: 70;
+}
+
+.modal-backdrop.is-visible {
+    display: block;
+}
+
+.popup-window {
+    position: fixed;
+    left: 50%;
+    top: 50%;
+    transform: translate(-50%, -50%);
+    width: min(780px, calc(100vw - 24px));
+    max-height: min(760px, calc(100vh - 24px));
+    display: none;
+    z-index: 80;
+    zoom: var(--ui-scale);
+}
+
+.popup-window.is-visible {
+    display: flex;
+    animation: popup-open-v10 180ms steps(5, end);
+}
+
+.popup-window.is-about-popup {
+    width: min(360px, calc(100vw - 28px));
+    min-height: 220px;
+}
+
+.popup-body {
+    flex: 1 1 auto;
+    min-height: 0;
+    max-height: calc(100vh - 90px);
+    padding: 12px;
+    overflow: auto;
+    font-size: 13px;
+    line-height: 16px;
+}
+
+.popup-body h3 { margin: 0 0 8px; font-size: 16px; line-height: 18px; }
+.popup-body h4 { margin: 14px 0 6px; font-size: 14px; line-height: 16px; }
+.popup-body p { margin: 0 0 8px; }
+.popup-body ul,
+.popup-body ol { margin: 0 0 8px 18px; padding: 0; }
+.popup-body li { margin: 0 0 4px; }
+.popup-body .code-block {
+    margin: 6px 0 10px;
+    width: 100%;
+    max-width: 100%;
+    display: block;
+    overflow: auto;
+    overscroll-behavior: contain;
+    padding: 8px;
+    color: #00ff66;
+    background: #000000;
+    border: 0;
+    font-family: 'MonoCraft', 'PixelOperatorMono', 'Courier New', monospace;
+    font-size: 12px;
+    line-height: 15px;
+    white-space: pre;
+    user-select: text;
+    -webkit-user-select: text;
+    box-sizing: border-box;
+    contain: layout paint;
+}
+
+.popup-window.is-about-popup .popup-body {
+    display: flex;
+    flex-direction: column;
+    justify-content: stretch;
+    overflow: hidden;
+}
+
+.about-popup-content {
+    flex: 1 1 auto;
+    display: flex;
+    flex-direction: column;
+    min-height: 0;
+}
+
+.about-popup-content p:last-child {
+    margin-top: auto;
+    margin-bottom: 0;
+    padding-top: 10px;
+}
+
+.popup-close {
+    cursor: pointer;
+}
+