Improve/harmonize segmentations panel and add bulk visibility toggles

extensions/dicom-segmentation/src/components/SegmentationPanel/SegmentationPanel.css

@@ -6,6 +6,7 @@
   width: 100%;
   display: flex;
   flex-direction: column;
+  padding: 20px;
 }
 
 .dcmseg-segmentation-panel.disabled {
@@ -14,19 +15,19 @@
 }
 
 .dcmseg-segmentation-panel h3 {
-  padding-left: 20px;
   margin-top: 0;
 }
 
 .dcmseg-segmentation-panel .segmentations {
-  padding: 0 20px 20px 20px;
+  padding-bottom: 10px;
 }
 
 .dcmseg-segmentation-panel .cog-icon {
-  margin: 20px 20px 0 0;
   align-self: flex-end;
   color: var(--default-color);
   cursor: pointer;
+  min-height: 23px;
+  max-height: 23px;
 }
 
 .dcmseg-segmentation-panel .cog-icon:hover {
@@ -48,11 +49,11 @@
   height: 150px;
 }
 
-.dcmseg-segmentation-panel .selector-form>div {
+.dcmseg-segmentation-panel .selector-form > div {
   width: 100%;
 }
 
-.dcmseg-segmentation-panel .selector-form>div:first-of-type {
+.dcmseg-segmentation-panel .selector-form > div:first-of-type {
   display: flex;
   flex-direction: row;
   justify-content: center;
@@ -64,3 +65,61 @@
   flex: unset;
   margin-right: 16px;
 }
+
+.SegmentsSection {
+  display: flex;
+  flex-direction: column;
+  color: var(--text-primary-color);
+  font-size: 12px;
+  margin-bottom: 0px;
+  height: 100%;
+}
+
+.SegmentsSection .header {
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+  justify-content: space-between;
+  background-color: var(--ui-gray-dark);
+  border-radius: 5px;
+  font-weight: bold;
+  padding: 10px 15px;
+}
+
+.SegmentsSection .count {
+  font-size: 15px;
+  color: var(--active-color);
+  margin-left: 15px;
+  border-radius: 5px;
+  background-color: var(--ui-gray-darker);
+  text-align: center;
+  min-width: 25px;
+}
+
+.SegmentsSection .header .eye-icon,
+.SegmentsSection .header .angle-double-down,
+.SegmentsSection .header .angle-double-up {
+  cursor: pointer;
+  color: var(--active-color);
+}
+
+.SegmentsSection .header .eye-icon:hover,
+.SegmentsSection .header .angle-double-down:hover,
+.SegmentsSection .header .angle-double-up:hover {
+  color: var(--hover-color);
+}
+
+.SegmentsSection .header .eye-icon.expanded {
+  color: var(--default-color);
+}
+
+.SegmentsSection .header .icons {
+  display: flex;
+  align-items: center;
+  border-radius: 5px;
+}
+
+.SegmentsSection .header .icons .angle-double-down,
+.SegmentsSection .header .icons .angle-double-up {
+  margin-left: 15px;
+}