Task(WF-1050621): Fixed the redundant keywords in TrackBarEx, ToggleButton and CheckBoxAdv WF control documentation

[VinothRavichandran414]

Description:
Updated Reduntant Keyword Fix for our TrackBarEx, ToggleButton and CheckBoxAdv WF control.

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: 1050621-ToggleButton-CheckBoxAdv

[SyncfusionBuild]

CI Status: SUCCESS ✅
Source Compilation: SUCCESS ✅
Build Location: 1050621-ToggleButton-CheckBoxAdv
Technical Error(s): 0
Spelling Error(s): 0
Image Alt Text Error(s): 0
Image Size Error(s): 0
Image Name Error(s): 0
Front matter Error(s): 0
MD File Encoding Error(s): 0
File Path Error(s): 0
CodeSnippet File Path Missing Error(s): 0
Toc Anchor Tags Validation Error(s): 0
MD Tag Validation Error(s): 0

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: 1050621-ToggleButton-CheckBoxAdv

[SyncfusionBuild]

CI Status: FAILURE ❌
Source Compilation: FAILURE ❌
Build Location: 1050621-ToggleButton-CheckBoxAdv

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: 1050621-ToggleButton-CheckBoxAdv

[SyncfusionBuild]

CI Status: SUCCESS ✅
Source Compilation: SUCCESS ✅
Build Location: 1050621-ToggleButton-CheckBoxAdv
Technical Error(s): 0
Spelling Error(s): 0
Image Alt Text Error(s): 0
Image Size Error(s): 0
Image Name Error(s): 0
Front matter Error(s): 0
MD File Encoding Error(s): 0
File Path Error(s): 0
CodeSnippet File Path Missing Error(s): 0
Toc Anchor Tags Validation Error(s): 0
MD Tag Validation Error(s): 0