Added a word clearing method and clipboard error signal to WalletHashManager.

A wallet operations model (create and restore) has been added to DapDashboardTab. Operation selection has been added to the DapInputNewWalletNameRightPanelForm panel. An Paste button has been added to the DapRecoveryWalletRightPanelForm panel. In recovery mode, all words are cleared and the Paste button is enabled. In DapInputNewWalletNameRightPanelForm, the alignment of elements is changed to ColumnLayout. If no recovery method is selected, the step with recovery information is skipped. The Copy, Paste, and Next buttons are now disabled and enabled. If the clipboard does not contain 24 words when pasting, an error is generated.