update bootstrap&bootswatch 5.0.2 -> 5.2.2. Seperate bootswatch overrides for future update easiness

dev/scss/bootstrap/helpers/_color-bg.scss

@@ -0,0 +1,10 @@
+// stylelint-disable function-name-case
+
+// All-caps `RGBA()` function used because of this Sass bug: https://github.com/sass/node-sass/issues/2251
+@each $color, $value in $theme-colors {
+  $color-rgb: to-rgb($value);
+  .text-bg-#{$color} {
+    color: color-contrast($value) if($enable-important-utilities, !important, null);
+    background-color: RGBA($color-rgb, var(--#{$prefix}bg-opacity, 1)) if($enable-important-utilities, !important, null);
+  }
+}

dev/scss/bootstrap/helpers/_colored-links.scss

@@ -1,11 +1,11 @@
 @each $color, $value in $theme-colors {
   .link-#{$color} {
-    color: $value;
+    color: $value !important; // stylelint-disable-line declaration-no-important
 
     @if $link-shade-percentage != 0 {
       &:hover,
       &:focus {
-        color: if(color-contrast($value) == $color-contrast-light, shade-color($value, $link-shade-percentage), tint-color($value, $link-shade-percentage));
+        color: if(color-contrast($value) == $color-contrast-light, shade-color($value, $link-shade-percentage), tint-color($value, $link-shade-percentage)) !important; // stylelint-disable-line declaration-no-important
       }
     }
   }

dev/scss/bootstrap/helpers/_position.scss

@@ -16,7 +16,7 @@
   z-index: $zindex-fixed;
 }
 
-// Responsive sticky top
+// Responsive sticky top and bottom
 @each $breakpoint in map-keys($grid-breakpoints) {
   @include media-breakpoint-up($breakpoint) {
     $infix: breakpoint-infix($breakpoint, $grid-breakpoints);
@@ -26,5 +26,11 @@
       top: 0;
       z-index: $zindex-sticky;
     }
+
+    .sticky#{$infix}-bottom {
+      position: sticky;
+      bottom: 0;
+      z-index: $zindex-sticky;
+    }
   }
 }

dev/scss/bootstrap/helpers/_ratio.scss

@@ -6,7 +6,7 @@
 
   &::before {
     display: block;
-    padding-top: var(--#{$variable-prefix}aspect-ratio);
+    padding-top: var(--#{$prefix}aspect-ratio);
     content: "";
   }
 
@@ -21,6 +21,6 @@
 
 @each $key, $ratio in $aspect-ratios {
   .ratio-#{$key} {
-    --#{$variable-prefix}aspect-ratio: #{$ratio};
+    --#{$prefix}aspect-ratio: #{$ratio};
   }
 }

dev/scss/bootstrap/helpers/_stacks.scss

@@ -0,0 +1,15 @@
+// scss-docs-start stacks
+.hstack {
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+  align-self: stretch;
+}
+
+.vstack {
+  display: flex;
+  flex: 1 1 auto;
+  flex-direction: column;
+  align-self: stretch;
+}
+// scss-docs-end stacks

dev/scss/bootstrap/helpers/_vr.scss

@@ -0,0 +1,8 @@
+.vr {
+  display: inline-block;
+  align-self: stretch;
+  width: 1px;
+  min-height: 1em;
+  background-color: currentcolor;
+  opacity: $hr-opacity;
+}