Trim space from share tokens

Signed-off-by: Michael Mayer <michael@liquidbytes.net>

frontend/src/dialog/share.vue

@@ -61,7 +61,6 @@
                               color="secondary-dark"
                               v-model="link.Token"
                               class="input-secret"
-                              mask="n"
                       ></v-text-field>
                     </v-flex>
                     <!-- v-flex xs12 sm6 class="pa-2">

internal/api/link.go

@@ -36,7 +36,7 @@ func UpdateLink(c *gin.Context) {
 	link.LinkExpires = f.LinkExpires
 
 	if f.LinkToken != "" {
-		link.LinkToken = strings.ToLower(f.LinkToken)
+		link.LinkToken = strings.TrimSpace(strings.ToLower(f.LinkToken))
 	}
 
 	if f.Password != "" {