Sliders added for Filter Plugin

Added Slider ,SpinBoxes and Angle Dial in Filter Widgets .

(Tell us how to test the changes you made.)

Build Krita,in Filter check if Sliders are provided for Filter and are working .If Angle dial or spinBox provided check whether they are in synch with each other and setting the filter properly.

Formalities Checklist

• I confirmed this builds.
• I confirmed Krita ran and the relevant functions work.
• I tested the relevant unit tests and can confirm they are not broken. (If not possible, don't hesitate to ask for help!)
• I made sure my commits build individually and have good descriptions as per KDE guidelines.
• I made sure my code conforms to the standards set in the HACKING file.
• I can confirm the code is licensed and attributed appropriately, and that unattributed code is mine, as per KDE Licensing Policy.