add extensions to default settings

gotify_tray/database/default_settings.py

@@ -21,6 +21,7 @@ DEFAULT_SETTINGS = {
     "MainWindow/button/size": 33,
     "MainWindow/application/icon/size": 40,
     "ImagePopup/enabled": False,
+    "ImagePopup/extensions": [".jpg", ".jpeg", ".png", ".svg"],
     "ImagePopup/w": 400,
     "ImagePopup/h": 400,
 }

gotify_tray/gui/widgets/MessageWidget.py

@@ -94,7 +94,7 @@ class MessageWidget(QtWidgets.QWidget, Ui_Form):
             return
         
         _, ext = os.path.splitext(link)
-        if ext in [".jpg", ".jpeg", ".png"]:
+        if ext in settings.value("ImagePopup/extensions", type=list):
             self.image_popup.emit(link, QtGui.QCursor.pos())
 
     def link_callbacks(self):