Fix missing color in themes

Author: D8H

newIDE/app/scripts/theme-templates/theme.json

@@ -541,6 +541,11 @@
     },
     "instruction-parameter": {
       "base": {
+        "color": {
+          "value": "#ffffff"
+        }
+      },
+      "string": {
         "color": {
           "value": "#93e500"
         }

newIDE/app/src/UI/Theme/BlueDarkTheme/theme.json

@@ -707,6 +707,11 @@
     },
     "instruction-parameter": {
       "base": {
+        "color": {
+          "value": "#ffffff"
+        }
+      },
+      "string": {
         "color": {
           "value": "#93e500"
         }

newIDE/app/src/UI/Theme/DeepBlueTheme/theme.json

@@ -582,6 +582,11 @@
     },
     "instruction-parameter": {
       "base": {
+        "color": {
+          "value": "#ffffff"
+        }
+      },
+      "string": {
         "color": {
           "value": "#79c0ff"
         }

newIDE/app/src/UI/Theme/DefaultDarkTheme/theme.json

@@ -764,6 +764,11 @@
     },
     "instruction-parameter": {
       "base": {
+        "color": {
+          "value": "#ffffff"
+        }
+      },
+      "string": {
         "color": {
           "value": "#0ECD7A"
         }

newIDE/app/src/UI/Theme/DefaultLightTheme/theme.json

@@ -762,6 +762,11 @@
     },
     "instruction-parameter": {
       "base": {
+        "color": {
+          "value": "#000000"
+        }
+      },
+      "string": {
         "color": {
           "value": "#00724E"
         }

newIDE/app/src/UI/Theme/NordTheme/theme.json

@@ -698,6 +698,11 @@
     },
     "instruction-parameter": {
       "base": {
+        "color": {
+          "value": "#ffffff"
+        }
+      },
+      "string": {
         "color": {
           "value": "#8FBCBB"
         }

newIDE/app/src/UI/Theme/OneDarkTheme/theme.json

@@ -703,6 +703,11 @@
     },
     "instruction-parameter": {
       "base": {
+        "color": {
+          "value": "#ffffff"
+        }
+      },
+      "string": {
         "color": {
           "value": "#98C379"
         }

newIDE/app/src/UI/Theme/RosePineTheme/theme.json

@@ -699,6 +699,11 @@
     },
     "instruction-parameter": {
       "base": {
+        "color": {
+          "value": "#ffffff"
+        }
+      },
+      "string": {
         "color": {
           "value": "#9ccfd8"
         }

newIDE/app/src/UI/Theme/SolarizedDarkTheme/theme.json

@@ -700,6 +700,11 @@
     },
     "instruction-parameter": {
       "base": {
+        "color": {
+          "value": "#ffffff"
+        }
+      },
+      "string": {
         "color": {
           "value": "#219186"
         }