Rename taskpanel.xhp to sidebar.xhp in Impress Help. A Help file for the Sidebar should be added to the other modules, too

Reduce the usage ot term 'Task pane' in Help, replace it with 'Sidebar'

(cherry picked from commit 329c0dd585887de0edfd120766b0b422c668ecb1)

Maintenance on Help files (work in progress)

(cherry picked from commit 6e38a29b75e3f511ff9d9bd8ff485105bb9f55b6)

Maintenance on Help files (work in progress)

(cherry picked from commit b184ee58a45b12312f77fb3fa8c9f75660168480)

Maintenance on Help files (work in progress)

(cherry picked from commit 74212ea0a7660b9fe8588178d6dc86efc982d5b0)

Small corrections in Help files

(cherry picked from commit db52f2069cf1354d4cb45996c4298c19ba60eaac)

Small corrections in Help files

(cherry picked from commit 6deb8101b02630e8bf1b9a3c789535f0154ca90f)

Small correction on Help files

(cherry picked from commit 7c98f0e85a59247e84a3a1c3e07ba08140df0a93)

Cleaning up Help files (done)

(cherry picked from commit 88cae784feb39df792066ad9ba0855cb6a643faa)

Cleaning up Help files (work in progress)

(cherry picked from commit 82a98929412d2995613c0bf288e99eee77919282)

Cleaning up Help files (work in progress)

(cherry picked from commit d1c38b032124661cefbf584a5830d4fd90d84d51)

Cleaning up Help files (work in progress)

(cherry picked from commit c2b55da138273a8c5516c767831837fc98f7fcd3)

Cleaning up Help files (work in progress)

(cherry picked from commit 54be4dae1772938a28f98646f061d2d449c6d0ec)

Cleaning up Help files (work in progress)

(cherry picked from commit ae3b042bfd6b402ff86730c8b53532379b5f0b02)

Cleaning up Help files (work in progress)

(cherry picked from commit cd3ec10655c7d4fe104c515c2e2cc684000c72be)

Cleaning up Help files (work in progress)

(cherry picked from commit 8b0727e7ed44e31313c995b311b07384976cf666)

Cleaning up Help files (work in progress)

(cherry picked from commit c5ffc49b5933f3a983f9f60f11d07691b8c1eb87)

Cleaning up Help files (work in progress)

(cherry picked from commit 94e420e41afc23c035f495c04762bc0b7f696a1d)

Cleaning up Help files (work in progress)

(cherry picked from commit 24486111f6b597b91f81569a2293013b5ee5b2c2)

Cleaning up Help files (work in progress)

(cherry picked from commit 3de3c617da84a39dccf9e942dae570f8d2f3f39a)

Cleaning up Help files (work in progress)

(cherry picked from commit 8bb3cbef61f196a604a71d6a91f78006fd8b15e3)

Cleaning up Help files (work in progress)

(cherry picked from commit 8e9b354db194089eefda0c2e615ab9aaa8e92b16)

Cleaning up Help files (work in progress)

(cherry picked from commit 95f9d0781adf3ea1563a28789c7500bc2fc65ed0)

Cleaning up Help files (work in progress)

(cherry picked from commit 1ab4867ad8ac7dab04020b6c29c3c956fcb110d9)

Cleaning up Help files (work in progress)

(cherry picked from commit 695fa56c0ad3d544bab4f5745baeefaea5045728)