Fixed duplicated tracker icon issue

Signed-off-by: Ko Nagase <[email protected]>

Author: sanak

src/components/gtt-setting.ts

@@ -4,19 +4,23 @@ import FontSymbol from 'ol-ext/style/FontSymbol'
 
 export const gtt_setting = ():void => {
   const glyph = FontSymbol.prototype.defs.glyphs
-  for (let font in FontSymbol.prototype.defs.fonts) {
-    for (let i in glyph) {
-      if (glyph[i].font == font) {
-        document.querySelectorAll("[id^='settings_tracker_']").forEach((element: HTMLSelectElement) => {
-          const selected = element.value === i
+  document.querySelectorAll("[id^='settings_tracker_']").forEach((element: HTMLSelectElement) => {
+    const selectedValue = element.value
+    if (element.length === 1) {
+      element.remove(0)
+    }
+    for (let font in FontSymbol.prototype.defs.fonts) {
+      for (let i in glyph) {
+        if (glyph[i].font == font) {
+          const selected = selectedValue === i
           element.append(new Option(i, i, selected, selected))
           if (selected) {
             element.nextElementSibling.className = i
           }
-        })
+        }
       }
     }
-  }
+  })
   document.querySelectorAll("[id^='settings_tracker_']").forEach((element: HTMLSelectElement) => {
     element.addEventListener('change', (ev) => {
       const currentTarget = ev.currentTarget as HTMLSelectElement