fix: update settings fallback html styling [IDE-1926] (#808)

* fix: update settings fallback html styling

* fix: security update to jackson-core

* fix: update theme for html fallback

Author: andrewrobinsonhodges-snyk

build.gradle.kts

@@ -47,7 +47,7 @@ repositories {
   maven { url = uri("https://cache-redirector.jetbrains.com/intellij-dependencies") }
 }
 
-configurations.all { resolutionStrategy.force("com.fasterxml.jackson.core:jackson-core:2.18.6") }
+configurations.all { resolutionStrategy.force("com.fasterxml.jackson.core:jackson-core:2.21.2") }
 
 dependencies {
   intellijPlatform {

src/main/kotlin/io/snyk/plugin/ui/jcef/ThemeBasedStylingGenerator.kt

@@ -218,9 +218,9 @@ class ThemeBasedStylingGenerator {
           "circle-color" to linkColor,
           // Fallback HTML variables
           "default-font" to "'$fontFamily', system-ui, -apple-system, sans-serif",
-          "section-background-color" to sectionBackground,
-          "input-background-color" to inputBgColor,
-          "focus-color" to focusBorderColor,
+          "section-background" to sectionBackground,
+          "input-background" to inputBgColor,
+          "focus-border" to focusBorderColor,
         )
 
       // Declaration prefix map for CSS variable declarations (e.g., --default-font: sans-serif ->