fix theme state not updating correctly

apps/remix-ide/src/app/plugins/solidity-umlgen.tsx

@@ -56,6 +56,8 @@ export class SolidityUmlGen extends ViewPlugin implements ISolidityUmlGen {
         const umlClasses = convertAST2UmlClasses(ast, this.currentFile)
         const umlDot = convertUmlClasses2Dot(umlClasses)
         const payload = vizRenderStringSync(umlDot)
+        const currentTheme = await this.call('theme', 'currentTheme')
+        this.currentlySelectedTheme = currentTheme.quality
         this.updatedSvg = payload
         this.renderComponent()
       } catch (error) {

libs/remix-ui/solidity-uml-gen/src/lib/solidity-uml-gen.tsx

@@ -80,7 +80,7 @@ export function RemixUiSolidityUmlGen ({ plugin, updatedSvg, loading, themeSelec
     </div>
   )
   const Display = () => {
-    const invert = themeSelected === 'dark' ? 'invert(1)' : 'invert(0)'
+    const invert = themeSelected === 'dark' ? 'invert(0.8)' : 'invert(0)'
     return (
     <div className="d-flex flex-column justify-content-center align-items-center">
       <div id="umlImageHolder" className="w-100 px-2 py-2">