update style setting (#2435)

Author: ndonkoHenri

sdk/python/packages/flet-core/src/flet_core/elevated_button.py

@@ -149,9 +149,21 @@ def _before_build_command(self):
             if self.__style is None:
                 self.__style = ButtonStyle()
             if self.__style.color != self.__color or self.disabled:
-                self.__style.color = self.__color if not self.disabled else None
+                # if the color is set through the style, use it
+                if not (
+                    self.__class__.__name__ in ["FilledButton", "FilledTonalButton"]
+                    and self.__style.color
+                    and not self.disabled
+                ):
+                    self.__style.color = self.__color if not self.disabled else None
             if self.__style.bgcolor != self.__bgcolor or self.disabled:
-                self.__style.bgcolor = self.__bgcolor if not self.disabled else None
+                # if the bgcolor is set through the style, use it
+                if not (
+                    self.__class__.__name__ in ["FilledButton", "FilledTonalButton"]
+                    and self.__style.bgcolor
+                    and not self.disabled
+                ):
+                    self.__style.bgcolor = self.__bgcolor if not self.disabled else None
             if self.__style.elevation != self.__elevation:
                 self.__style.elevation = self.__elevation
         if self.__style is not None: