certificate uploader dialog fix

Author: francescospissu

arduino-ide-extension/src/browser/style/certificate-uploader-dialog.css

@@ -7,17 +7,18 @@
 }
 .certificate-uploader-dialog .arduino-select__control {
   height: 31px;
-  background: var(--theia-menubar-selectionBackground) !important;
+  background: var(--theia-dropdown-background) !important;
 }
 
 .certificate-uploader-dialog .dialogRow > button{
   margin-right: 3px;
 }
 
 .certificate-uploader-dialog .certificate-list {
-  border: 1px solid #BDC7C7;
+  border: 1px solid var(--theia-editorWidget-border);
   border-radius: 2px;;
-  background: var(--theia-menubar-selectionBackground) !important;
+  color: var(--theia-editor-foreground);
+  background-color: var(--theia-editor-background);
   overflow: auto;
   height: 120px;
   flex: 1;
@@ -60,9 +61,10 @@
 
 .certificate-add {
   padding: 16px;
-  background-color: var(--theia-list-hoverBackground);
   border-radius: 3px;
-  border: 1px solid #BDC7C7;
+  border: 1px solid var(--theia-editorWidget-border);
+  color: var(--theia-editorWidget-foreground);
+  background-color: var(--theia-editorWidget-background);
 }
 
 .certificate-add input {
@@ -72,9 +74,3 @@
   box-sizing: border-box;
 
 }
-
-/* High Contrast Theme rules */
-/* TODO: Remove it when the Theia version is upgraded to 1.27.0 and use Theia APIs to implement it*/
-.hc-black.hc-theia.theia-hc .certificate-add {
-  background-color: var(--theia-editorWidget-background);
-}