Optimise code

[mangoomeh]

New dark theme:

• Arranged the code in a better flow: variables to set on the top, labels together, grid together
• Reduced usage of global variables
• Replaced all the try/except in the get_data function to a simple if-clause to check if there is a live match going on.
• Fixed the dark/light theme

[swapnilsparsh]

Thank you @mangoomeh for contibuting in the project.