applets/swkbd: Make use of std::move where applicable

Avoids redundant string copies

src/core/hle/service/am/applets/software_keyboard.cpp

@@ -290,10 +290,10 @@ void SoftwareKeyboard::ProcessTextCheck() {
         SubmitNormalOutputAndExit(SwkbdResult::Ok, current_text);
         break;
     case SwkbdTextCheckResult::Failure:
-        ShowTextCheckDialog(SwkbdTextCheckResult::Failure, text_check_message);
+        ShowTextCheckDialog(SwkbdTextCheckResult::Failure, std::move(text_check_message));
         break;
     case SwkbdTextCheckResult::Confirm:
-        ShowTextCheckDialog(SwkbdTextCheckResult::Confirm, text_check_message);
+        ShowTextCheckDialog(SwkbdTextCheckResult::Confirm, std::move(text_check_message));
         break;
     case SwkbdTextCheckResult::Silent:
     default:
@@ -487,7 +487,7 @@ void SoftwareKeyboard::InitializeFrontendKeyboard() {
             max_text_length <= 32 ? SwkbdTextDrawType::Line : SwkbdTextDrawType::Box;
 
         Core::Frontend::KeyboardInitializeParameters initialize_parameters{
-            .ok_text{ok_text},
+            .ok_text{std::move(ok_text)},
             .header_text{},
             .sub_text{},
             .guide_text{},
@@ -563,10 +563,10 @@ void SoftwareKeyboard::InitializeFrontendKeyboard() {
                                                : false;
 
         Core::Frontend::KeyboardInitializeParameters initialize_parameters{
-            .ok_text{ok_text},
-            .header_text{header_text},
-            .sub_text{sub_text},
-            .guide_text{guide_text},
+            .ok_text{std::move(ok_text)},
+            .header_text{std::move(header_text)},
+            .sub_text{std::move(sub_text)},
+            .guide_text{std::move(guide_text)},
             .initial_text{initial_text},
             .max_text_length{max_text_length},
             .min_text_length{min_text_length},
@@ -595,7 +595,7 @@ void SoftwareKeyboard::ShowNormalKeyboard() {
 
 void SoftwareKeyboard::ShowTextCheckDialog(SwkbdTextCheckResult text_check_result,
                                            std::u16string text_check_message) {
-    frontend.ShowTextCheckDialog(text_check_result, text_check_message);
+    frontend.ShowTextCheckDialog(text_check_result, std::move(text_check_message));
 }
 
 void SoftwareKeyboard::ShowInlineKeyboard() {

src/yuzu/applets/software_keyboard.cpp

@@ -1101,12 +1101,11 @@ void QtSoftwareKeyboardDialog::NormalKeyboardButtonClicked(QPushButton* button)
     }
 
     if (button == ui->button_ok || button == ui->button_ok_shift || button == ui->button_ok_num) {
-        if (ui->topOSK->currentIndex() == 1) {
-            emit SubmitNormalText(SwkbdResult::Ok,
-                                  ui->text_edit_osk->toPlainText().toStdU16String());
-        } else {
-            emit SubmitNormalText(SwkbdResult::Ok, ui->line_edit_osk->text().toStdU16String());
-        }
+        auto text = ui->topOSK->currentIndex() == 1
+                        ? ui->text_edit_osk->toPlainText().toStdU16String()
+                        : ui->line_edit_osk->text().toStdU16String();
+
+        emit SubmitNormalText(SwkbdResult::Ok, std::move(text));
         return;
     }
 
@@ -1265,13 +1264,11 @@ void QtSoftwareKeyboardDialog::TranslateButtonPress(HIDButton button) {
         if (is_inline) {
             emit SubmitInlineText(SwkbdReplyType::DecidedCancel, current_text, cursor_position);
         } else {
-            if (ui->topOSK->currentIndex() == 1) {
-                emit SubmitNormalText(SwkbdResult::Cancel,
-                                      ui->text_edit_osk->toPlainText().toStdU16String());
-            } else {
-                emit SubmitNormalText(SwkbdResult::Cancel,
-                                      ui->line_edit_osk->text().toStdU16String());
-            }
+            auto text = ui->topOSK->currentIndex() == 1
+                            ? ui->text_edit_osk->toPlainText().toStdU16String()
+                            : ui->line_edit_osk->text().toStdU16String();
+
+            emit SubmitNormalText(SwkbdResult::Cancel, std::move(text));
         }
         break;
     case HIDButton::Y:
@@ -1563,7 +1560,7 @@ void QtSoftwareKeyboard::ShowNormalKeyboard() const {
 void QtSoftwareKeyboard::ShowTextCheckDialog(
     Service::AM::Applets::SwkbdTextCheckResult text_check_result,
     std::u16string text_check_message) const {
-    emit MainWindowShowTextCheckDialog(text_check_result, text_check_message);
+    emit MainWindowShowTextCheckDialog(text_check_result, std::move(text_check_message));
 }
 
 void QtSoftwareKeyboard::ShowInlineKeyboard(