container: add file manager feature, thanks to luci-app-filebrowser

applications/luci-app-dockerman/htdocs/luci-static/resources/dockerman/file-manager.css

@@ -0,0 +1,91 @@
+.fb-container {
+  margin-top: 1rem;
+}
+.fb-container .cbi-button {
+  height: 1.8rem;
+}
+.fb-container .cbi-input-text {
+  margin-bottom: 1rem;
+  width: 100%;
+}
+.fb-container .panel-title {
+  padding-bottom: 0;
+  width: 50%;
+  border-bottom: none;
+}
+.fb-container .panel-container {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding-bottom: 1rem;
+  border-bottom: 1px solid #eee;
+}
+.fb-container .upload-container {
+  display: none;
+  margin: 1rem 0;
+}
+.fb-container .upload-file {
+  margin-right: 2rem;
+}
+.fb-container .cbi-value-field {
+  text-align: left;
+}
+.fb-container .parent-icon strong {
+  margin-left: 1rem;
+}
+.fb-container td[class$="-icon"] {
+  cursor: pointer;
+}
+.fb-container .file-icon, .fb-container .folder-icon, .fb-container .link-icon {
+  position: relative;
+}
+.fb-container .file-icon:before, .fb-container .folder-icon:before, .fb-container .link-icon:before {
+  display: inline-block;
+  width: 1.5rem;
+  height: 1.5rem;
+  content: '';
+  background-size: contain;
+  margin: 0 0.5rem 0 1rem;
+  vertical-align: middle;
+}
+.fb-container .file-icon:before {
+  background-image: url(file-icon.png);
+}
+.fb-container .folder-icon:before {
+  background-image: url(folder-icon.png);
+}
+.fb-container .link-icon:before {
+  background-image: url(link-icon.png);
+}
+@media screen and (max-width: 480px) {
+  .fb-container .upload-file {
+      width: 14.6rem;
+  }
+  .fb-container .cbi-value-owner,
+  .fb-container .cbi-value-perm {
+      display: none;
+  }
+}
+
+.cbi-section-table {
+  width: 100%;
+}
+
+.cbi-section-table-cell {
+  text-align: right;
+}
+
+.cbi-button-install {
+border-color: #c44;
+  color: #c44;
+  margin-left: 3px;
+}
+
+.cbi-value-field {
+  padding: 10px 0;
+}
+
+.parent-icon {
+  height: 1.8rem;
+  padding: 10px 0;
+}