Add 'Show on a map' button to Location in profile, fix layout (#26214)

Not too important, but I think that it'd be a pretty neat touch.

Also fixes some layout bugs introduced by a previous PR.

---------

Co-authored-by: Gusted <postmaster@gusted.xyz>
Co-authored-by: Caesar Schinas <caesar@caesarschinas.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

tests/integration/user_test.go

@@ -12,6 +12,7 @@ import (
 	repo_model "code.gitea.io/gitea/models/repo"
 	"code.gitea.io/gitea/models/unittest"
 	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/setting"
 	api "code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/test"
 	"code.gitea.io/gitea/modules/translation"
@@ -276,3 +277,23 @@ func TestListStopWatches(t *testing.T) {
 		assert.Greater(t, apiWatches[0].Seconds, int64(0))
 	}
 }
+
+func TestUserLocationMapLink(t *testing.T) {
+	setting.Service.UserLocationMapURL = "https://example/foo/"
+	defer tests.PrepareTestEnv(t)()
+
+	session := loginUser(t, "user2")
+	req := NewRequestWithValues(t, "POST", "/user/settings", map[string]string{
+		"_csrf":    GetCSRF(t, session, "/user/settings"),
+		"name":     "user2",
+		"email":    "user@example.com",
+		"language": "en-US",
+		"location": "A/b",
+	})
+	session.MakeRequest(t, req, http.StatusSeeOther)
+
+	req = NewRequest(t, "GET", "/user2/")
+	resp := session.MakeRequest(t, req, http.StatusOK)
+	htmlDoc := NewHTMLParser(t, resp.Body)
+	htmlDoc.AssertElement(t, `a[href="https://example/foo/A%2Fb"]`, true)
+}