"Add" overwrites presets (#3896)

* style
* param presets: to not overwrite on add when name exists

lib/extensions/lettering_svg_font_to_layers.py

@@ -28,8 +28,6 @@ from .base import InkstitchExtension
 
 from ..svg import PIXELS_PER_MM
 
-import unicodedata
-
 
 class LetteringSvgFontToLayers(InkstitchExtension):
     """
@@ -162,7 +160,7 @@ class LetteringSvgFontToLayers(InkstitchExtension):
 
         return baseline
 
-    def convert_glyph_to_layer(self, glyph, emsize, baseline, scale_by, hide_layer):
+    def convert_glyph_to_layer(self, glyph, emsize, baseline, scale_by, hide_layer):  # noqa C901
         """
         Converts a single glyph into a new SVG layer, applying scaling and coordinate transformation.
         """

lib/gui/presets.py

@@ -137,6 +137,7 @@ class PresetsPanel(wx.Panel):
 
         if not overwrite and preset_name in self._load_presets():
             info_dialog(self, _('Preset "%s" already exists.  Please use another name or press "Overwrite"') % preset_name, caption=_('Preset'))
+            return
 
         self.store_preset(preset_name, self.parent.get_preset_data())