fix(navbar): adjust padding and icon/avatar size in indigo theme, remove redundant styles in bootstrap theme (#1956)

Co-authored-by: Simeon Simeonoff <sim.simeonoff@gmail.com>

Author: desig9stein

src/components/navbar/themes/shared/navbar.bootstrap.scss

@@ -5,11 +5,6 @@ $theme: $bootstrap;
 
 :host {
     box-shadow: var(--ig-elevation-0);
-    padding: 0 pad-inline(rem(8px));
-}
-
-[part='base'] {
-    padding-inline: pad-inline(rem(4px));
 }
 
 ::slotted(*) {

src/components/navbar/themes/shared/navbar.indigo.scss

@@ -8,6 +8,11 @@
     [name='end']::slotted(*) {
         margin: initial;
     }
+
+    ::slotted(igc-icon),
+    ::slotted(igc-avatar) {
+        --ig-size: 2;
+    }
 }
 
 [part='end'] {
@@ -23,12 +28,6 @@
 }
 
 ::slotted(igc-icon) {
-    --size: rem(16px);
-
     padding: pad(rem(6px));
     margin: 0;
 }
-
-::slotted(igc-avatar) {
-    --ig-size: 2;
-}