Re-instate default lower_bound for mag scalar and ip

Author: domfournier

simpeg_drivers-assets/uijson/induced_polarization_3d_inversion.ui.json

@@ -124,7 +124,7 @@
         "property": "",
         "optional": true,
         "value": 0.0,
-        "enabled": false
+        "enabled": true
     },
     "upper_bound": {
         "association": [

simpeg_drivers-assets/uijson/induced_polarization_batch2d_inversion.ui.json

@@ -161,7 +161,7 @@
         "property": "",
         "optional": true,
         "value": 0.0,
-        "enabled": false
+        "enabled": true
     },
     "upper_bound": {
         "association": "Cell",

simpeg_drivers-assets/uijson/magnetic_scalar_inversion.ui.json

@@ -409,7 +409,7 @@
         "property": "",
         "optional": true,
         "value": 0.0,
-        "enabled": false
+        "enabled": true
     },
     "upper_bound": {
         "association": [