Resetting the app after deletion and cleanup settings (#372)

* Fixes #361 - Reset everything if the app has been deleted since the last run

* Cleaned up and renamed the ElementSettings to ApplicationSettings. Removed its singleton and moved it to the service locator.

* Moved the ApplicationSettings to the Application folder

* Merged together the BuildSettings and ApplicationSettings

* Reset the UserDefaults too when resetting the application state

* Rename ServiceLocator.applicationSettings to just settings

* Fix indentation

* Rename ApplicationSettings to AppSettings

* Various tweaks following code review

* Fix unit tests

UITests/Sources/SettingsUITests.swift

@@ -26,12 +26,9 @@ class SettingsUITests: XCTestCase {
         let reportBugButton = app.buttons["reportBugButton"]
         XCTAssert(reportBugButton.exists)
         XCTAssertEqual(reportBugButton.label, ElementL10n.sendBugReport)
-        XCTAssertEqual(app.buttons["crashButton"].exists, BuildSettings.settingsCrashButtonVisible)
 
-        XCTAssertEqual(app.buttons["timelineStylePicker"].exists, BuildSettings.settingsShowTimelineStyle)
-        if BuildSettings.settingsShowTimelineStyle {
-            XCTAssertTrue(app.staticTexts[ElementL10n.settingsTimelineStyle].exists)
-        }
+        XCTAssertTrue(app.buttons["timelineStylePicker"].exists)
+        XCTAssertTrue(app.staticTexts[ElementL10n.settingsTimelineStyle].exists)
         
         let logoutButton = app.buttons["logoutButton"]
         XCTAssert(logoutButton.exists)

UITests/Sources/__Snapshots__/Application/de-DE-iPad-9th-generation.settings.png

@@ -1,3 +1,3 @@
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UITests/Sources/__Snapshots__/Application/de-DE-iPhone-14.settings.png

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+size 109653

UITests/Sources/__Snapshots__/Application/en-GB-iPad-9th-generation.settings.png

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UITests/Sources/__Snapshots__/Application/fr-FR-iPad-9th-generation.settings.png

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