feat: make form styles global, small fixes

Author: woothu

src/components/Form/CForm.vue

@@ -29,6 +29,6 @@ export default {
 }
 </script>
 
-<style scoped lang="scss">
+<style lang="scss">
   @import "~@coreui/coreui/scss/partials/forms.scss";
 </style>

src/components/Form/CFormCheckbox.vue

@@ -1,4 +1,4 @@
-c-<template>
+<template>
   <CFormGroup v-bind="{validFeedback, invalidFeedback, tooltipFeedback,
                        description, class: computedClasses}">
     <template #input>
@@ -157,6 +157,6 @@ export default {
 }
 </script>
 
-<style scoped lang="scss">
+<style lang="scss">
   @import "~@coreui/coreui/scss/partials/forms.scss";
 </style>

src/components/Form/CFormFile.vue

@@ -178,6 +178,6 @@ export default {
 }
 </script>
 
-<style scoped lang="scss">
+<style lang="scss">
   @import "~@coreui/coreui/scss/partials/forms.scss";
 </style>

src/components/Form/CFormGroup.vue

@@ -8,7 +8,7 @@
       <div :class="props.wrapperClasses">
         <div
           v-if="props.prependHtml || $slots.prepend"
-          class="input-group-prepend"
+          class="c-input-group-prepend"
         >
           <slot name="prepend">
             <span
@@ -122,7 +122,7 @@ export default {
 }
 </script>
 
-<style scoped lang="scss">
+<style lang="scss">
   @import "~@coreui/coreui/scss/partials/forms.scss";
   @import "~@coreui/coreui/scss/partials/input-group.scss";
   @import "~@coreui/coreui/scss/partials/grid.scss";

src/components/Form/CFormInput.vue

@@ -189,6 +189,6 @@ export default {
 }
 </script>
 
-<style scoped lang="scss">
+<style lang="scss">
   @import "~@coreui/coreui/scss/partials/forms.scss";
 </style>

src/components/Form/CFormSelect.vue

@@ -201,6 +201,6 @@ export default {
 }
 </script>
 
-<style scoped lang="scss">
+<style lang="scss">
   @import "~@coreui/coreui/scss/partials/forms.scss";
 </style>

src/components/Form/CFormTextarea.vue

@@ -175,6 +175,6 @@ export default {
 }
 </script>
 
-<style scoped lang="scss">
+<style lang="scss">
   @import "~@coreui/coreui/scss/partials/forms.scss";
 </style>