Fix padding, color, and move to reka-ui popover (#8164)

- Fixes some options, like decrement, being off center
- Fixes button being very hard to see on light themes
- Moves the popover to use our fancy new reka-ui Popover component
instead of primvue
- Since the display control is no longer in the ValueControlPopover,
loading is now actually async
 
Most changed lines in `ValueControlPopover` are just indentation.

| Before | After |
| ------ | ----- |
| <img width="360" alt="before"
src="https://github.com/user-attachments/assets/5867d70c-a606-4092-a5f8-dd18ecda5b6f"
/> | <img width="360" alt="after"
src="https://github.com/user-attachments/assets/7bbaf036-77da-4c98-acb0-4b142e4a4761"
/>|

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8164-Fix-padding-color-and-move-to-reka-ui-popover-2ed6d73d3650817ea314f04699f1387f)
by [Unito](https://www.unito.io)

---------

Co-authored-by: github-actions <github-actions@github.com>

src/renderer/extensions/vueNodes/widgets/components/WidgetWithControl.vue

@@ -2,6 +2,7 @@
 import { computed, defineAsyncComponent, ref, watch } from 'vue'
 import type { Component } from 'vue'
 
+import Popover from '@/components/ui/Popover.vue'
 import Button from '@/components/ui/button/Button.vue'
 import type {
   SimplifiedControlWidget,
@@ -19,8 +20,6 @@ const props = defineProps<{
 
 const modelValue = defineModel<T>()
 
-const popover = ref()
-
 const controlModel = ref(props.widget.controlWidget.value)
 
 const controlButtonIcon = computed(() => {
@@ -37,24 +36,24 @@ const controlButtonIcon = computed(() => {
 })
 
 watch(controlModel, props.widget.controlWidget.update)
-
-const togglePopover = (event: Event) => {
-  popover.value.toggle(event)
-}
 </script>
-
 <template>
   <div class="relative grid grid-cols-subgrid">
     <component :is="component" v-bind="$attrs" v-model="modelValue" :widget>
-      <Button
-        variant="textonly"
-        size="sm"
-        class="h-4 w-7 self-center rounded-xl bg-blue-100/30 p-0"
-        @click.stop.prevent="togglePopover"
-      >
-        <i :class="`${controlButtonIcon} text-blue-100 text-xs size-3.5`" />
-      </Button>
+      <Popover>
+        <template #button>
+          <Button
+            variant="textonly"
+            size="sm"
+            class="h-4 w-7 p-0 self-center rounded-xl bg-primary-background/30 hover:bg-primary-background-hover/30"
+          >
+            <i
+              :class="`${controlButtonIcon} text-primary-background text-xs w-full`"
+            />
+          </Button>
+        </template>
+        <ValueControlPopover v-model="controlModel" />
+      </Popover>
     </component>
-    <ValueControlPopover ref="popover" v-model="controlModel" />
   </div>
 </template>