More string and translation improvements (#6570)

* Qt: Minor rewording on the storage controllers settings page

All translations updated accordingly
(the "Hard disk" string is still used in the PC5086 config and therefore
has been moved to a suitable place)

Also fix broken translations for ter/qua IDE controllers

* Qt: Don't attempt to translate storage bus names

* Qt: Remove translations for non-generic joystick names

These weren't actually supposed to be translated
Thrustmaster Formulas were left in because of "with/out adapter"

* Qt: Tooltip and icon text fixing

* Restore unused strings that were to be used as tooltips
for Ctrl+Alt+Del/Esc buttons
* Consistently define tooltips and iconText to avoid mnemonics showing
in CJK languages
* Remove tooltips from actions that only show up in menus

* Qt: Add ACPI shutdown to menu

* Qt: Drop "SoundFont" string from translations

This is a brand name that shouldn't be translated

* Qt: Replace three-dot ellipsis with a single-character one

* Manager: workaround for font mismatch on language change

src/qt/qt_vmmanager_system.cpp

@@ -124,7 +124,7 @@ VMManagerSystem::scanForConfigs(QWidget *parent, const QString &searchPath)
     QProgressDialog progDialog(parent);
     unsigned int    found = 0;
     progDialog.setCancelButton(nullptr);
-    progDialog.setWindowTitle(tr("Searching for VMs..."));
+    progDialog.setWindowTitle(tr("Searching for VMs…"));
     progDialog.setMinimumDuration(0);
     progDialog.setValue(0);
     progDialog.setMinimum(0);