Change Details

Main changes: * Consolidate scrollbar setup code, reducing replicated lines of code split across disparate gui elements. * Rename `m_Width` to `m_Breadth` as `m_Length`/`m_Breadth` makes more sense, particularly for when we (finally) implement horizontal scrollbars. * Rename the `scroll_bottom` and `scroll_top` attributes to something that should make it more obvious what they do. * Consolidate two repeated code sections (including a magic `1.5`) into a shared method. Minor changes: * Correct some spelling/grammar in comments. * Change uses of "scroll bar" and "scroll-bar" to "scrollbar" for consistency. * Update years on affected `.cpp`/`.h` files. **Note:** The modifications to `mainmenu.{xml|js}` are for test purposes only and are not intended to be included when committed. **Note:** I'm fairly inexperienced when it comes to c++ and so if I've made any rookie mistakes (or even not-so-rookie mistakes) I apologise. And tell me //gently//, please :wink:.

Main changes: * Consolidate scrollbar setup code, reducing replicated lines of code split across disparate gui elements. * Rename `m_Width` to `m_Breadth` as `m_Length`/`m_Breadth` makes more sense, particularly for when we (finally) implement horizontal scrollbars. * Rename the `scroll_bottom` and `scroll_top` attributes to something that should make it more obvious what they do. * Consolidate two repeated code sections (including a magic `1.5`) into a shared method. Minor changes: * Correct some spelling/grammar in comments. * Change uses of "scroll bar" and "scroll-bar" to "scrollbar" for consistency. * Update years on affected `.cpp`/`.h` files. * Draw scrollbars on top of the background sprite of the gui elements, instead of underneath it **Note:** The modifications to `mainmenu.{xml|js}` are for test purposes only and are not intended to be included when committed. **Note:** I'm fairly inexperienced when it comes to c++ and so if I've made any rookie mistakes (or even not-so-rookie mistakes) I apologise. And tell me //gently//, please :wink:.

Main changes: * Consolidate scrollbar setup code, reducing replicated lines of code split across disparate gui elements. * Rename `m_Width` to `m_Breadth` as `m_Length`/`m_Breadth` makes more sense, particularly for when we (finally) implement horizontal scrollbars. * Rename the `scroll_bottom` and `scroll_top` attributes to something that should make it more obvious what they do. * Consolidate two repeated code sections (including a magic `1.5`) into a shared method. Minor changes: * Correct some spelling/grammar in comments. * Change uses of "scroll bar" and "scroll-bar" to "scrollbar" for consistency. * Update years on affected `.cpp`/`.h` files. * Draw scrollbars on top of the background sprite of the gui elements, instead of underneath it **Note:** The modifications to `mainmenu.{xml|js}` are for test purposes only and are not intended to be included when committed. **Note:** I'm fairly inexperienced when it comes to c++ and so if I've made any rookie mistakes (or even not-so-rookie mistakes) I apologise. And tell me //gently//, please :wink:.