Custom terminal fonts support (#5414)

Fixes #5132 #5133 
- bundled 7 new monospaced fonts for terminal
- fix: refresh terminal font after changing in the preferences / keep cluster iframe accessible in DOM while not active/focused
- display terminal's custom font preview with font-name in the select-box + live-preload for current `fontSize`, fix lint

* Fixes for <Input/>:
- remove duplicated error messages for sync validators
- don't propagate invalid values on change (uncontrolled components only)
- more informative error message for numeric input with min/max info

src/renderer/components/+helm-releases/release-details/release-details.scss

@@ -66,7 +66,7 @@
 
   .notes {
     white-space: pre-line;
-    font-family: "RobotoMono", monospace;
+    font-family: var(--font-monospace);
     font-size: small;
   }