Added a double speed mode (#5959)

* Backend implementation of double speed mode done

* Added the GUI for the 2x button

* Added the tooltip text

assets/textures/gui/bevel/Speed2XButton.svg.import

@@ -0,0 +1,37 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://cq3ewq272kbxb"
+path="res://.godot/imported/Speed2XButton.svg-3318e62436800505570b68c42f6dfd88.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://assets/textures/gui/bevel/Speed2XButton.svg"
+dest_files=["res://.godot/imported/Speed2XButton.svg-3318e62436800505570b68c42f6dfd88.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=true
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=256
+detect_3d/compress_to=1
+svg/scale=1.0
+editor/scale_with_editor_scale=false
+editor/convert_colors_with_editor_theme=false

assets/textures/gui/bevel/Speed2XButtonActive.svg.import

@@ -0,0 +1,37 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://gee04cb8dj2n"
+path="res://.godot/imported/Speed2XButtonActive.svg-1dd0d282d3646bc633329ea9d5f04316.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://assets/textures/gui/bevel/Speed2XButtonActive.svg"
+dest_files=["res://.godot/imported/Speed2XButtonActive.svg-1dd0d282d3646bc633329ea9d5f04316.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=true
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=256
+detect_3d/compress_to=1
+svg/scale=1.0
+editor/scale_with_editor_scale=false
+editor/convert_colors_with_editor_theme=false

assets/textures/gui/bevel/Speed2XButtonDisabled.svg.import

@@ -0,0 +1,37 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://xq1p0mf4k8sq"
+path="res://.godot/imported/Speed2XButtonDisabled.svg-ed35436f5ff98fba3b18081265c037f7.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://assets/textures/gui/bevel/Speed2XButtonDisabled.svg"
+dest_files=["res://.godot/imported/Speed2XButtonDisabled.svg-ed35436f5ff98fba3b18081265c037f7.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=true
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=256
+detect_3d/compress_to=1
+svg/scale=1.0
+editor/scale_with_editor_scale=false
+editor/convert_colors_with_editor_theme=false