admin: Refactor synchronization status report + display last git error

admin/sync/full.go

@@ -24,6 +24,22 @@ var oneThemeDeepSync sync.Mutex
 // DeepSyncProgress expose the progression of the depp synchronization (0 = 0%, 255 = 100%).
 var DeepSyncProgress uint8
 
+func OneDeepSyncStatus() bool {
+	if oneDeepSync.TryLock() {
+		oneDeepSync.Unlock()
+		return true
+	}
+	return false
+}
+
+func OneThemeDeepSyncStatus() bool {
+	if oneThemeDeepSync.TryLock() {
+		oneThemeDeepSync.Unlock()
+		return true
+	}
+	return false
+}
+
 type SyncReport struct {
 	DateStart    time.Time           `json:"_started"`
 	DateEnd      time.Time           `json:"_ended"`