Adds a border to PR and Issue buttons on home

Author: d13

src/webviews/apps/plus/home/components/branch-card.ts

@@ -172,12 +172,14 @@ export const branchCardStyles = css`
 	:host-context(.vscode-high-contrast) .branch-item__missing {
 		--button-background: color-mix(in lab, var(--vscode-sideBar-background) 100%, #fff 3%);
 		--button-hover-background: color-mix(in lab, var(--vscode-sideBar-background) 100%, #fff 1.5%);
+		--button-border: color-mix(in lab, var(--vscode-sideBar-background) 100%, #fff 12%);
 	}
 
 	:host-context(.vscode-light) .branch-item__missing,
 	:host-context(.vscode-high-contrast-light) .branch-item__missing {
 		--button-background: color-mix(in lab, var(--vscode-sideBar-background) 100%, #000 8%);
 		--button-hover-background: color-mix(in lab, var(--vscode-sideBar-background) 100%, #000 10%);
+		--button-border: color-mix(in lab, var(--vscode-sideBar-background) 100%, #000 14%);
 	}
 
 	.branch-item__category {