Add avatar to team and team members page (#10305)

* teams: add db migration for email column in teams table

* teams: /teams should render index page with a 200 OK

* teams: additional backend functionality for team and team members

Possibility to save/update email for teams.
Possibility to retrive avatar url when searching for teams.
Possibility to retrive avatar url when searching for team members.

* teams: display team avatar and team member avatars

Possibility to save and update email for a team

* teams: create team on separate page instead of modal dialog

pkg/api/dtos/models.go

@@ -3,6 +3,7 @@ package dtos
 import (
 	"crypto/md5"
 	"fmt"
+	"regexp"
 	"strings"
 
 	"github.com/grafana/grafana/pkg/components/simplejson"
@@ -57,3 +58,19 @@ func GetGravatarUrl(text string) string {
 	hasher.Write([]byte(strings.ToLower(text)))
 	return fmt.Sprintf(setting.AppSubUrl+"/avatar/%x", hasher.Sum(nil))
 }
+
+func GetGravatarUrlWithDefault(text string, defaultText string) string {
+	if text != "" {
+		return GetGravatarUrl(text)
+	}
+
+	reg, err := regexp.Compile("[^a-zA-Z0-9]+")
+
+	if err != nil {
+		return ""
+	}
+
+	text = reg.ReplaceAllString(defaultText, "") + "@localhost"
+
+	return GetGravatarUrl(text)
+}