Widgets: Remove left/right default margins in MessageLabel

- Those margins need to be set according to where/how that widget is
used.
- Set those margins where the label is used.

Author: ccordoba12

spyder/plugins/projects/widgets/projectdialog.py

@@ -99,6 +99,16 @@ def __init__(self, parent):
         self._validation_label = MessageLabel(self)
         self._validation_label.setVisible(False)
 
+        validation_label_css = self._validation_label.css
+        validation_label_css.QLabel.setValues(
+            marginRight=f"{7 * AppStyle.MarginSize}px",
+            # The extra 5px are necessary because we need to add them to all
+            # lineedits in this dialog to align them to the labels on top of
+            # them (see SpyderConfigPage.create_lineedit).
+            marginLeft=f"{7 * AppStyle.MarginSize + 5}px",
+        )
+        self._validation_label.setStyleSheet(validation_label_css.toString())
+
         self._description_font = self.get_font(SpyderFontType.Interface)
         self._description_font.setPointSize(
             self._description_font.pointSize() + 1

spyder/plugins/remoteclient/widgets/connectionpages.py

@@ -413,6 +413,7 @@ def _create_password_subpage(self):
         )
 
         validation_label = MessageLabel(self)
+        self._set_css_for_validation_label(validation_label)
 
         # Add widgets to their required dicts
         self._widgets_for_validation[AuthenticationMethod.Password].append(
@@ -468,6 +469,7 @@ def _create_keyfile_subpage(self):
         )
 
         validation_label = MessageLabel(self)
+        self._set_css_for_validation_label(validation_label)
 
         # Add widgets to their required dicts
         self._widgets_for_validation[AuthenticationMethod.KeyFile].append(
@@ -517,6 +519,7 @@ def _create_configfile_subpage(self):
         )
 
         validation_label = MessageLabel(self)
+        self._set_css_for_validation_label(validation_label)
 
         # Add widgets to their required dicts
         self._name_widgets[AuthenticationMethod.ConfigFile] = name
@@ -573,6 +576,7 @@ def _create_jupyterhub_subpage(self):
         )
 
         validation_label = MessageLabel(self)
+        self._set_css_for_validation_label(validation_label)
 
         # Add widgets to their required dicts
         self._name_widgets[AuthenticationMethod.JupyterHub] = name
@@ -698,6 +702,17 @@ def _compose_failed_validation_text(self, reasons: ValidationReasons):
 
         return text
 
+    def _set_css_for_validation_label(self, label: MessageLabel):
+        css = label.css
+        css.QLabel.setValues(
+            marginRight=f"{9 * AppStyle.MarginSize}px",
+            # The extra 5px are necessary because we need to add them to all
+            # lineedits in this dialog to align them to the labels on top of
+            # them (see SpyderConfigPage.create_lineedit).
+            marginLeft=f"{9 * AppStyle.MarginSize + 5}px",
+        )
+        label.setStyleSheet(css.toString())
+
 
 class NewConnectionPage(BaseConnectionPage):
     """Page to receive SSH credentials for a remote connection."""

spyder/widgets/helperwidgets.py

@@ -799,24 +799,23 @@ def __init__(self, parent):
         self.setVisible(False)
 
         # Set style
-        css = qstylizer.style.StyleSheet()
-        css.QLabel.setValues(
+        self.css = qstylizer.style.StyleSheet()
+        self.css.QLabel.setValues(
             backgroundColor=SpyderPalette.COLOR_BACKGROUND_2,
-            # Top margin is set by the layout
+            # Top margin is usually set by the layout
             marginTop="0px",
-            marginRight=f"{9 * AppStyle.MarginSize}px",
-            # We don't need bottom margin because there are no other elements
-            # below this one.
+            # We usually don't need bottom margin because there are no other
+            # elements below this one.
             marginBottom="0px",
-            # The extra 5px are necessary because we need to add them to all
-            # lineedits in this dialog to align them to the labels on top of
-            # them (see SpyderConfigPage.create_lineedit).
-            marginLeft=f"{9 * AppStyle.MarginSize + 5}px",
+            # Left and right margins need to be set according to where/how this
+            # widget is used.
+            marginLeft="0px",
+            marginRight="0px",
             padding=f"{3 * AppStyle.MarginSize}px {6 * AppStyle.MarginSize}px",
             borderRadius=SpyderPalette.SIZE_BORDER_RADIUS,
         )
 
-        self.setStyleSheet(css.toString())
+        self.setStyleSheet(self.css.toString())
 
     def set_text(self, text: str):
         n_reasons = 1