refactor: cuesheet design review

fix: parsing of custom fields for blocks
refactor: extract cuesheet settings
refactor: cuesheet actions
refactor: improve cuesheet performance on resizing

apps/client/src/common/components/input/delay-input/DelayInput.module.scss

@@ -9,7 +9,7 @@ $input-font-size: 15px;
 
   .inputField {
     font-size: $input-font-size;
-    letter-spacing: 1px;
+    letter-spacing: 0.5px;
     max-width: 7em;
     padding-left: 16px;
     color: $ontime-delay-text

apps/client/src/common/components/input/time-input/TimeInput.module.scss

@@ -1,6 +1,6 @@
 .timeInput {
   width: 100%;
   max-width: 7.5em;
-  letter-spacing: 1px;
+  letter-spacing: 0.5px;
   font-variant-numeric: tabular-nums;
 }