Separate media keys from keyboard shortcuts

The media keys were only in the keyboard shortcuts file because their
implementation was the same. With Linux support incoming their
implementations are not necessarily the same.

src/keyboard_input/keyboard_input.cpp

@@ -0,0 +1,59 @@
+#include "keyboard_input.h"
+#include "src/keyboard_input/input_sender.h"
+
+namespace keyboardinput
+{
+void sendKeyboardInput( QString input )
+{
+    sendStringAsInput( input.toStdString() );
+}
+
+void sendKeyboardEnter()
+{
+    const auto tokens = std::vector<Token>{ Token::KEY_ENTER };
+
+    sendTokensAsInput( tokens );
+}
+
+void sendKeyboardBackspace( const int count )
+{
+    const auto tokens = std::vector<Token>{ Token::KEY_BACKSPACE };
+    for ( int i = 0; i < count; ++i )
+    {
+        sendTokensAsInput( tokens );
+    }
+}
+
+void sendKeyboardAltTab()
+{
+    const auto tokens
+        = std::vector<Token>{ Token::MODIFIER_ALT, Token::KEY_TAB };
+
+    sendTokensAsInput( tokens );
+}
+
+void sendKeyboardAltEnter()
+{
+    const auto tokens
+        = std::vector<Token>{ Token::MODIFIER_ALT, Token::KEY_ENTER };
+
+    sendTokensAsInput( tokens );
+}
+
+void sendKeyboardCtrlC()
+{
+    const auto tokens
+        = std::vector<Token>{ Token::MODIFIER_CTRL, Token::KEY_c };
+
+    sendTokensAsInput( tokens );
+}
+
+void sendKeyboardCtrlV()
+{
+    const auto tokens
+        = std::vector<Token>{ Token::MODIFIER_CTRL, Token::KEY_v };
+
+    sendTokensAsInput( tokens );
+}
+
+} // namespace keyboardinput