fix: OAuth clients limit links open in current tab

  When the connected OAuth clients limit is reached on a Cozy, we
  display a blocking modal during the OAuth flow when trying to connect
  yet another client.
  In this situation we want the links displayed in the modal (i.e. to
  manage the connected clients or subscribe to another offer) to open in
  a new tab as this modal can be displayed in apps windows without any
  navigation means.

  However, when the modal is displayed when navigating in the Cozy in a
  browser because the limit has been exceeded, we don't have this
  limitation so the links should open in the same tab.

assets/templates/oauth_clients_limit_exceeded.html

@@ -26,14 +26,14 @@ <h1 class="h4 h2-md mb-4 text-center">{{t "Too Many OAuth Clients Title" .Client
               {{t "Too Many OAuth Clients Available Actions"}}
             </p>
             {{if .PremiumURL}}
-            <a href="{{.PremiumURL}}" target="_blank" class="btn btn-primary btn-md-lg w-100 mb-2">
+            <a href="{{.PremiumURL}}" {{with .OpenLinksInNewTab}}target="_blank"{{end}} class="btn btn-primary btn-md-lg w-100 mb-2">
               {{t "Too Many OAuth Clients Offers Btn"}}
             </a>
-            <a href="{{.ManageDevicesURL}}" target="_blank" class="btn btn-outline-info btn-md-lg w-100">
+            <a href="{{.ManageDevicesURL}}" {{with .OpenLinksInNewTab}}target="_blank"{{end}} class="btn btn-outline-info btn-md-lg w-100">
               {{t "Too Many OAuth Clients Settings Btn"}}
             </a>
             {{else}}
-            <a href="{{.ManageDevicesURL}}" target="_blank" class="btn btn-primary btn-md-lg w-100">
+            <a href="{{.ManageDevicesURL}}" {{with .OpenLinksInNewTab}}target="_blank"{{end}} class="btn btn-primary btn-md-lg w-100">
               {{t "Too Many OAuth Clients Settings Btn"}}
             </a>
             {{end}}

web/auth/oauth.go

@@ -271,16 +271,17 @@ func (a *AuthorizeHTTPHandler) authorizeForm(c echo.Context) error {
 				settingsToken := inst.BuildAppToken(consts.SettingsSlug, sess.ID())
 
 				return c.Render(http.StatusOK, "oauth_clients_limit_exceeded.html", echo.Map{
-					"Domain":           inst.ContextualDomain(),
-					"ContextName":      inst.ContextName,
-					"Locale":           inst.Locale,
-					"Title":            inst.TemplateTitle(),
-					"Favicon":          middlewares.Favicon(inst),
-					"ClientsCount":     strconv.Itoa(count),
-					"ClientsLimit":     strconv.Itoa(limit),
-					"ManageDevicesURL": manageDevicesURL,
-					"PremiumURL":       premiumURL,
-					"SettingsToken":    settingsToken,
+					"Domain":            inst.ContextualDomain(),
+					"ContextName":       inst.ContextName,
+					"Locale":            inst.Locale,
+					"Title":             inst.TemplateTitle(),
+					"Favicon":           middlewares.Favicon(inst),
+					"ClientsCount":      strconv.Itoa(count),
+					"ClientsLimit":      strconv.Itoa(limit),
+					"OpenLinksInNewTab": true,
+					"ManageDevicesURL":  manageDevicesURL,
+					"PremiumURL":        premiumURL,
+					"SettingsToken":     settingsToken,
 				})
 			}
 		}