remove unwanted jumps in ink/stitch medium font (#3295)

and also have description and json be coherent and add ï and Ï

fonts/medium_font/font.json

@@ -8,8 +8,8 @@
     "auto_satin": true,
     "reversible": true,
     "default_glyph": "<22>",
-    "min_scale": 0.7,
-    "max_scale": 2.0,
+    "min_scale": 0.75,
+    "max_scale": 1.5,
     "size": 15.24,
     "horiz_adv_x_default": null,
     "horiz_adv_x_space": 51,
@@ -27,6 +27,7 @@
         "G",
         "H",
         "I",
+        "Ï",
         "J",
         "K",
         "L",
@@ -56,6 +57,7 @@
         "g",
         "h",
         "i",
+        "ï",
         "j",
         "k",
         "l",
@@ -106,7 +108,6 @@
         "/",
         "<22>",
         ";",
-        "ÉÈÊË",
         "ë",
         "é",
         "è",