Clarify bank allocation action

frontend/pages/banking/statements/[mode]/[[id]].vue

@@ -699,13 +699,12 @@ setup()
                       <span class="font-mono text-xs text-gray-500 mr-2">{{ option.number }}</span> {{ option.label }}
                     </template>
                   </USelectMenu>
-                  <UTooltip text="Manuell Buchen">
                   <UButton
-                        icon="i-heroicons-plus"
+                      icon="i-heroicons-check"
+                      label="Buchen"
                       :disabled="!accountToSave"
                       @click="saveAllocation({bankstatement: itemInfo.id, amount: manualAllocationSum, account: accountToSave, description: allocationDescription })"
                   />
-                  </UTooltip>
                 </div>
               </UFormField>
             </div>