Show icon previews in icon pickers

Browser.py

@@ -2128,7 +2128,11 @@ class Browser(ft.Row):
                 value=Override.Icon if Override else "",
                 label="Custom icon",
                 options=[ft.DropdownOption(key="", text="(Use default)")] + [
-                    ft.DropdownOption(key=Name, text=FolderIconLabelOverrides.get(Name, Name.split("_")[0].title()))
+                    ft.DropdownOption(
+                        key=Name,
+                        text=FolderIconLabelOverrides.get(Name, Name.split("_")[0].title()),
+                        leading_icon=getattr(ft.Icons, Name),
+                    )
                     for Name in FolderIconChoices
                 ],
             )
@@ -2319,7 +2323,11 @@ class Browser(ft.Row):
             value=DefaultBookmarkIcon,
             label="Icon",
             options=[
-                ft.DropdownOption(key=Name, text=IconLabelOverrides.get(Name, Name.split("_")[0].title()))
+                ft.DropdownOption(
+                    key=Name,
+                    text=IconLabelOverrides.get(Name, Name.split("_")[0].title()),
+                    leading_icon=getattr(ft.Icons, Name),
+                )
                 for Name in BookmarkIconChoices
             ],
         )

Settings.py

@@ -181,7 +181,10 @@ def BuildSettingsDialog(
 
             IconDropdown = ft.Dropdown(
                 value=BandData["Icon"],
-                options=[ft.DropdownOption(key=Name, text=_FolderIconLabel(Name)) for Name in FolderIconChoices],
+                options=[
+                    ft.DropdownOption(key=Name, text=_FolderIconLabel(Name), leading_icon=getattr(ft.Icons, Name))
+                    for Name in FolderIconChoices
+                ],
                 width=150,
             )
             ImageField = ft.TextField(value=BandData["ImagePath"], label="Or custom image path", expand=True)

Sidebar.py

@@ -296,7 +296,11 @@ class Sidebar(ft.Container):
             value=Bookmark.Icon,
             label="Icon",
             options=[
-                ft.DropdownOption(key=Name, text=IconLabelOverrides.get(Name, Name.split("_")[0].title()))
+                ft.DropdownOption(
+                    key=Name,
+                    text=IconLabelOverrides.get(Name, Name.split("_")[0].title()),
+                    leading_icon=getattr(ft.Icons, Name),
+                )
                 for Name in IconChoices
             ],
         )