Added SnackBar.action_color

Fix #364

Author: FeodorFitsner

package/lib/src/controls/snack_bar.dart

@@ -43,6 +43,8 @@ class _SnackBarControlState extends State<SnackBarControl> {
     SnackBarAction? action = actionName != ""
         ? SnackBarAction(
             label: actionName,
+            textColor: HexColor.fromString(Theme.of(context),
+                widget.control.attrString("actionColor", "")!),
             onPressed: () {
               debugPrint("SnackBar ${widget.control.id} clicked!");
               FletAppServices.of(context).ws.pageEventFromWeb(

sdk/python/flet/snack_bar.py

@@ -9,7 +9,7 @@
 class SnackBar(Control):
     def __init__(
         self,
-        content: Optional[Control] = None,
+        content: Control,
         ref: Optional[Ref] = None,
         disabled: Optional[bool] = None,
         visible: Optional[bool] = None,
@@ -20,6 +20,7 @@ def __init__(
         open: bool = False,
         # remove_current_snackbar: bool = False,
         action: Optional[str] = None,
+        action_color: Optional[str] = None,
         bgcolor: Optional[str] = None,
         on_action=None,
     ):
@@ -36,6 +37,7 @@ def __init__(
         # self.remove_current_snackbar = remove_current_snackbar
         self.content = content
         self.action = action
+        self.action_color = action_color
         self.bgcolor = bgcolor
         self.on_action = on_action
 
@@ -90,6 +92,15 @@ def action(self):
     def action(self, value):
         self._set_attr("action", value)
 
+    # action_color
+    @property
+    def action_color(self):
+        return self._get_attr("actionColor")
+
+    @action_color.setter
+    def action_color(self, value):
+        self._set_attr("actionColor", value)
+
     # bgcolor
     @property
     def bgcolor(self):